diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 1b41b2162d55..f0f535981300 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -498,6 +498,29 @@ public function findOrNew($id, $columns = ['*'])
         return $this->newModelInstance();
     }
 
+    /**
+     * Find a model by its primary key or call a callback.
+     *
+     * @param  mixed  $id
+     * @param  \Closure|array  $columns
+     * @param  \Closure|null  $callback
+     * @return \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Collection|static[]|static|mixed
+     */
+    public function findOr($id, $columns = ['*'], Closure $callback = null)
+    {
+        if ($columns instanceof Closure) {
+            $callback = $columns;
+
+            $columns = ['*'];
+        }
+
+        if (! is_null($model = $this->find($id, $columns))) {
+            return $model;
+        }
+
+        return $callback();
+    }
+
     /**
      * Get the first record matching the attributes or instantiate it.
      *
diff --git a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
index cda0dc0e3b92..fd73157e16dc 100755
--- a/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
+++ b/src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php
@@ -711,6 +711,37 @@ public function findOrFail($id, $columns = ['*'])
         throw (new ModelNotFoundException)->setModel(get_class($this->related), $id);
     }
 
+    /**
+     * Find a related model by its primary key or call a callback.
+     *
+     * @param  mixed  $id
+     * @param  \Closure|array  $columns
+     * @param  \Closure|null  $callback
+     * @return \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Collection|mixed
+     */
+    public function findOr($id, $columns = ['*'], Closure $callback = null)
+    {
+        if ($columns instanceof Closure) {
+            $callback = $columns;
+
+            $columns = ['*'];
+        }
+
+        $result = $this->find($id, $columns);
+
+        $id = $id instanceof Arrayable ? $id->toArray() : $id;
+
+        if (is_array($id)) {
+            if (count($result) === count(array_unique($id))) {
+                return $result;
+            }
+        } elseif (! is_null($result)) {
+            return $result;
+        }
+
+        return $callback();
+    }
+
     /**
      * Add a basic where clause to the query, and return the first result.
      *
diff --git a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
index 74326957364c..893d5fab906b 100644
--- a/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
+++ b/src/Illuminate/Database/Eloquent/Relations/HasManyThrough.php
@@ -388,6 +388,37 @@ public function findOrFail($id, $columns = ['*'])
         throw (new ModelNotFoundException)->setModel(get_class($this->related), $id);
     }
 
+    /**
+     * Find a related model by its primary key or call a callback.
+     *
+     * @param  mixed  $id
+     * @param  \Closure|array  $columns
+     * @param  \Closure|null  $callback
+     * @return \Illuminate\Database\Eloquent\Model|\Illuminate\Database\Eloquent\Collection|mixed
+     */
+    public function findOr($id, $columns = ['*'], Closure $callback = null)
+    {
+        if ($columns instanceof Closure) {
+            $callback = $columns;
+
+            $columns = ['*'];
+        }
+
+        $result = $this->find($id, $columns);
+
+        $id = $id instanceof Arrayable ? $id->toArray() : $id;
+
+        if (is_array($id)) {
+            if (count($result) === count(array_unique($id))) {
+                return $result;
+            }
+        } elseif (! is_null($result)) {
+            return $result;
+        }
+
+        return $callback();
+    }
+
     /**
      * Get the results of the relationship.
      *
diff --git a/tests/Database/DatabaseEloquentBuilderTest.php b/tests/Database/DatabaseEloquentBuilderTest.php
index 044167daf033..48c350ee5b11 100755
--- a/tests/Database/DatabaseEloquentBuilderTest.php
+++ b/tests/Database/DatabaseEloquentBuilderTest.php
@@ -154,6 +154,75 @@ public function testFindOrFailMethodWithManyUsingCollectionThrowsModelNotFoundEx
         $builder->findOrFail(new Collection([1, 2]), ['column']);
     }
 
+    public function testFindOrMethod()
+    {
+        $builder = m::mock(Builder::class.'[first]', [$this->getMockQueryBuilder()]);
+        $model = $this->getMockModel();
+        $model->shouldReceive('getKeyType')->andReturn('int');
+        $builder->setModel($model);
+        $builder->getQuery()->shouldReceive('where')->with('foo_table.foo', '=', 1)->twice();
+        $builder->getQuery()->shouldReceive('where')->with('foo_table.foo', '=', 2)->once();
+        $builder->shouldReceive('first')->andReturn($model)->once();
+        $builder->shouldReceive('first')->with(['column'])->andReturn($model)->once();
+        $builder->shouldReceive('first')->andReturn(null)->once();
+
+        $this->assertSame($model, $builder->findOr(1, fn () => 'callback result'));
+        $this->assertSame($model, $builder->findOr(1, ['column'], fn () => 'callback result'));
+        $this->assertSame('callback result', $builder->findOr(2, fn () => 'callback result'));
+    }
+
+    public function testFindOrMethodWithMany()
+    {
+        $builder = m::mock(Builder::class.'[get]', [$this->getMockQueryBuilder()]);
+        $model1 = $this->getMockModel();
+        $model2 = $this->getMockModel();
+        $builder->setModel($model1);
+        $builder->getQuery()->shouldReceive('whereIn')->with('foo_table.foo', [1, 2])->twice();
+        $builder->getQuery()->shouldReceive('whereIn')->with('foo_table.foo', [1, 2, 3])->once();
+        $builder->shouldReceive('get')->andReturn(new Collection([$model1, $model2]))->once();
+        $builder->shouldReceive('get')->with(['column'])->andReturn(new Collection([$model1, $model2]))->once();
+        $builder->shouldReceive('get')->andReturn(null)->once();
+
+        $result = $builder->findOr([1, 2], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame($model1, $result[0]);
+        $this->assertSame($model2, $result[1]);
+
+        $result = $builder->findOr([1, 2], ['column'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame($model1, $result[0]);
+        $this->assertSame($model2, $result[1]);
+
+        $result = $builder->findOr([1, 2, 3], fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
+    public function testFindOrMethodWithManyUsingCollection()
+    {
+        $builder = m::mock(Builder::class.'[get]', [$this->getMockQueryBuilder()]);
+        $model1 = $this->getMockModel();
+        $model2 = $this->getMockModel();
+        $builder->setModel($model1);
+        $builder->getQuery()->shouldReceive('whereIn')->with('foo_table.foo', [1, 2])->twice();
+        $builder->getQuery()->shouldReceive('whereIn')->with('foo_table.foo', [1, 2, 3])->once();
+        $builder->shouldReceive('get')->andReturn(new Collection([$model1, $model2]))->once();
+        $builder->shouldReceive('get')->with(['column'])->andReturn(new Collection([$model1, $model2]))->once();
+        $builder->shouldReceive('get')->andReturn(null)->once();
+
+        $result = $builder->findOr(new Collection([1, 2]), fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame($model1, $result[0]);
+        $this->assertSame($model2, $result[1]);
+
+        $result = $builder->findOr(new Collection([1, 2]), ['column'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame($model1, $result[0]);
+        $this->assertSame($model2, $result[1]);
+
+        $result = $builder->findOr(new Collection([1, 2, 3]), fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
     public function testFirstOrFailMethodThrowsModelNotFoundException()
     {
         $this->expectException(ModelNotFoundException::class);
diff --git a/tests/Database/DatabaseEloquentHasManyThroughIntegrationTest.php b/tests/Database/DatabaseEloquentHasManyThroughIntegrationTest.php
index 4aef3e4a595f..9ffcbdd5a453 100644
--- a/tests/Database/DatabaseEloquentHasManyThroughIntegrationTest.php
+++ b/tests/Database/DatabaseEloquentHasManyThroughIntegrationTest.php
@@ -201,6 +201,80 @@ public function testFindOrFailWithManyUsingCollectionThrowsAnException()
         HasManyThroughTestCountry::first()->posts()->findOrFail(new Collection([1, 2]));
     }
 
+    public function testFindOrMethod()
+    {
+        HasManyThroughTestCountry::create(['id' => 1, 'name' => 'United States of America', 'shortname' => 'us'])
+                                 ->users()->create(['id' => 1, 'email' => 'taylorotwell@gmail.com', 'country_short' => 'us'])
+                                 ->posts()->create(['id' => 1, 'title' => 'A title', 'body' => 'A body', 'email' => 'taylorotwell@gmail.com']);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(1, fn () => 'callback result');
+        $this->assertInstanceOf(HasManyThroughTestPost::class, $result);
+        $this->assertSame(1, $result->id);
+        $this->assertSame('A title', $result->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(1, ['posts.id'], fn () => 'callback result');
+        $this->assertInstanceOf(HasManyThroughTestPost::class, $result);
+        $this->assertSame(1, $result->id);
+        $this->assertNull($result->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(2, fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
+    public function testFindOrMethodWithMany()
+    {
+        HasManyThroughTestCountry::create(['id' => 1, 'name' => 'United States of America', 'shortname' => 'us'])
+                                 ->users()->create(['id' => 1, 'email' => 'taylorotwell@gmail.com', 'country_short' => 'us'])
+                                 ->posts()->createMany([
+                                     ['id' => 1, 'title' => 'A title', 'body' => 'A body', 'email' => 'taylorotwell@gmail.com'],
+                                     ['id' => 2, 'title' => 'Another title', 'body' => 'Another body', 'email' => 'taylorotwell@gmail.com'],
+                                 ]);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr([1, 2], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertSame('A title', $result[0]->title);
+        $this->assertSame('Another title', $result[1]->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr([1, 2], ['posts.id'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNull($result[0]->title);
+        $this->assertNull($result[1]->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr([1, 2, 3], fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
+    public function testFindOrMethodWithManyUsingCollection()
+    {
+        HasManyThroughTestCountry::create(['id' => 1, 'name' => 'United States of America', 'shortname' => 'us'])
+                                 ->users()->create(['id' => 1, 'email' => 'taylorotwell@gmail.com', 'country_short' => 'us'])
+                                 ->posts()->createMany([
+                                     ['id' => 1, 'title' => 'A title', 'body' => 'A body', 'email' => 'taylorotwell@gmail.com'],
+                                     ['id' => 2, 'title' => 'Another title', 'body' => 'Another body', 'email' => 'taylorotwell@gmail.com'],
+                                 ]);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(new Collection([1, 2]), fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertSame('A title', $result[0]->title);
+        $this->assertSame('Another title', $result[1]->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(new Collection([1, 2]), ['posts.id'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNull($result[0]->title);
+        $this->assertNull($result[1]->title);
+
+        $result = HasManyThroughTestCountry::first()->posts()->findOr(new Collection([1, 2, 3]), fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
     public function testFirstRetrievesFirstRecord()
     {
         $this->seedData();
diff --git a/tests/Integration/Database/EloquentBelongsToManyTest.php b/tests/Integration/Database/EloquentBelongsToManyTest.php
index 5f08195ab0bc..1d0b9d5c53f7 100644
--- a/tests/Integration/Database/EloquentBelongsToManyTest.php
+++ b/tests/Integration/Database/EloquentBelongsToManyTest.php
@@ -413,6 +413,77 @@ public function testFindOrNewMethod()
         $this->assertInstanceOf(Tag::class, $post->tags()->findOrNew(666));
     }
 
+    public function testFindOrMethod()
+    {
+        $post = Post::create(['title' => Str::random()]);
+        $post->tags()->create(['name' => Str::random()]);
+
+        $result = $post->tags()->findOr(1, fn () => 'callback result');
+        $this->assertInstanceOf(Tag::class, $result);
+        $this->assertSame(1, $result->id);
+        $this->assertNotNull($result->name);
+
+        $result = $post->tags()->findOr(1, ['id'], fn () => 'callback result');
+        $this->assertInstanceOf(Tag::class, $result);
+        $this->assertSame(1, $result->id);
+        $this->assertNull($result->name);
+
+        $result = $post->tags()->findOr(2, fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
+    public function testFindOrMethodWithMany()
+    {
+        $post = Post::create(['title' => Str::random()]);
+        $post->tags()->createMany([
+            ['name' => Str::random()],
+            ['name' => Str::random()],
+        ]);
+
+        $result = $post->tags()->findOr([1, 2], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNotNull($result[0]->name);
+        $this->assertNotNull($result[1]->name);
+
+        $result = $post->tags()->findOr([1, 2], ['id'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNull($result[0]->name);
+        $this->assertNull($result[1]->name);
+
+        $result = $post->tags()->findOr([1, 2, 3], fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
+    public function testFindOrMethodWithManyUsingCollection()
+    {
+        $post = Post::create(['title' => Str::random()]);
+        $post->tags()->createMany([
+            ['name' => Str::random()],
+            ['name' => Str::random()],
+        ]);
+
+        $result = $post->tags()->findOr(new Collection([1, 2]), fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNotNull($result[0]->name);
+        $this->assertNotNull($result[1]->name);
+
+        $result = $post->tags()->findOr(new Collection([1, 2]), ['id'], fn () => 'callback result');
+        $this->assertInstanceOf(Collection::class, $result);
+        $this->assertSame(1, $result[0]->id);
+        $this->assertSame(2, $result[1]->id);
+        $this->assertNull($result[0]->name);
+        $this->assertNull($result[1]->name);
+
+        $result = $post->tags()->findOr(new Collection([1, 2, 3]), fn () => 'callback result');
+        $this->assertSame('callback result', $result);
+    }
+
     public function testFirstOrNewMethod()
     {
         $post = Post::create(['title' => Str::random()]);