Leonard: I’ve always been a little confused about this — why don’t Hindus eat beef?

Raj: We believe cows are gods.

Sheldon: Not technically. In Hinduism cattle are thought to be like gods.

Raj: Do not tell me about my own culture, Sheldon! In the mood I’m in, I’ll take you out, I swear to cow!

The Big Bang Theory, Season 3: Episode 4 – “The Pirate Solution”