Doonesbury by Garry Trudeau for December 19, 1973
Transcript:
Rev. Sloan: What is it, Thor? Thor: Director, I don't want to be Joseph anymore... Rev. Sloan: Why not, Thor? It's a major role, you know... Thor: Yeah, but he's boring! There's no character development... Rev. Sloan: Still, he's very key to the pageant. Thor: Look, how about if you just re-cast me as a Nubian slave? Rev. Sloan: In this day and age? Thor: Okay, then - a Nubian waiter!
This joke would be reused in the animated special.