He said that he was in no rush.
And. Did you believe him, that he was in no rush?
Well yeah, he said that he was in no rush.
If a grown man said he wasn't in a rush, it is best to believe that he knows what he's talking about instead of rushing him unnecessarily. It is usually best to let adults do what the feel they need to without interfering.
But I have to supervise him every time he does any job. No wonder he was in no rush. He used me to get out of work.
Well as a supervisor you should let him do the job at his own pace. If you rush him when he doesn't want to be rushed he could make a mistake.