Calvin and Hobbes by Bill Watterson for October 12, 1987
Calvin: Hi, Dad. I'm repeating everthing anyone says. Dad: Oh, you are, are you? Calvin: Oh you are, are you? Dad: Knock it off, Calvin. That's very annoying. Calvin: Knock it off, Calvin, that's very annoying. Dad: I forfeit all my desserts for a week. Calvin: Ok, give them to me. Dad: Ha ha. Why don't you go bother your mother for a while?