Vegeta Father of the Year

Yep! It's from the 2nd episode of Dragon Ball Super

Uhh I think this is the beginning of the Majiin Buu Arc in DBZ

I'm pretty sure it's from Super. Episode 2 is called "To the Promised Resort! Vegeta Takes a Family Trip!" and in it, there's a scene where this happens to explain why they're on vacation

I know the scene that you are talking about, and now I'm sure this one is in DBZ

It did happen in a flashback sequence, so it might actually be referring to the scene you're talking about from DBZ