God famously creates the universe in six days, and rests on the seventh. This is Genesis 2:2:
However, "rest" can mean simply "do nothing", as in: "the moving object came to rest". That would be the end of the matter, if not for Exodus 31:17:
The most literal translations of the Bible such as the ESV and the NASB give the word "refreshed" here, which in English has definite connotations of recovering from tiredness. Still, it could be some sort of metaphor for "breathed it all in and took delight in it". Bible Contradictions Answered gives essentially this reply.
I just don't know how plausible this is in ancient Hebrew. This seems like a fairly technical translation issue that - uh - rests on the correct translation of a single word. I don't feel qualified to judge it.