Season 2 Episode 9 “Bitter Work”:

Sokka: “Okay Karma person or thing whoever’s in charge of this stuff, if I can just get out of this situation alive, I will give up meat, and sarcasm. Ok? That’s all I got. It’s pretty much my whole identity, Sokka, the meat and sarcasm guy, but I’m willing to be Sokka the veggies and straight talk fellow. Deal?”

If Sokka had kept up his end of the bargain…