Yes, that was in the Noah story back in Genesis...specifically, "I won't destroy the world this way again. I made this double rainbow all across the sky to prove it!"

And yes, most of the following 'angry god' stuff in the Old Testament is not so much God having beef with humanity in general, as it is God having beef specifically with Israel, since He made a pact with them early on in their history (hence the whole Ark of the Covenant.) If you look at most of the stories there, it is really not God going "I find you all unworthy and smite you all!" to humanity, as it is "Hey, you promised me you'd do this for me and you're not holding up your end of the deal!" to Israel.