diff --git a/src/main/java/org/jsoup/helper/HttpConnection.java b/src/main/java/org/jsoup/helper/HttpConnection.java
index 9cc6bc1414..6b856fe68e 100644
--- a/src/main/java/org/jsoup/helper/HttpConnection.java
+++ b/src/main/java/org/jsoup/helper/HttpConnection.java
@@ -183,7 +183,7 @@ public Connection url(String url) {
         try {
             req.url(new URL(encodeUrl(url)));
         } catch (MalformedURLException e) {
-            throw new IllegalArgumentException(String.format("The supplied URL, '%s', is malformed. Make sure it is an absolute URL, and starts with 'http://' or 'https://'.", url), e);
+            throw new IllegalArgumentException(String.format("The supplied URL, '%s', is malformed. Make sure it is an absolute URL, and starts with 'http://' or 'https://'. See https://jsoup.org/cookbook/extracting-data/working-with-urls", url), e);
         }
         return this;
     }
diff --git a/src/test/java/org/jsoup/helper/HttpConnectionTest.java b/src/test/java/org/jsoup/helper/HttpConnectionTest.java
index 4bd7dfb502..1fe5181509 100644
--- a/src/test/java/org/jsoup/helper/HttpConnectionTest.java
+++ b/src/test/java/org/jsoup/helper/HttpConnectionTest.java
@@ -306,7 +306,7 @@ public void caseInsensitiveHeaders(Locale locale) {
             Jsoup.connect("jsoup.org/test");
         } catch (IllegalArgumentException e) {
             threw = true;
-            assertEquals("The supplied URL, 'jsoup.org/test', is malformed. Make sure it is an absolute URL, and starts with 'http://' or 'https://'.", e.getMessage());
+            assertEquals("The supplied URL, 'jsoup.org/test', is malformed. Make sure it is an absolute URL, and starts with 'http://' or 'https://'. See https://jsoup.org/cookbook/extracting-data/working-with-urls", e.getMessage());
         }
         assertTrue(threw);
     }