29 "I will put one question to you," said Jesus. "Answer me that, and then I will tell you what authority I have to act as I do.
Mark 11:29 Cross References - Twentieth_Century
Matthew 21:24
24 "I, too," said Jesus in reply, "will ask you one question; if you will give me an answer to it, then I, also, will tell you what authority I have to act as I do.
Luke 20:3-8
3 "I, too," said Jesus in reply, "will ask you one question. Give me an answer to it.
4 It is about John's baptism--was it of divine or of human origin?"
5 But they began arguing together: "If we say 'divine,' he will say 'Why did not you believe him?'
6 But, if we say 'human,' the people will all stone us, for they are persuaded that John was a Prophet."
7 So they answered that they did not know its origin.
8 "Then I," said Jesus, "refuse to tell you what authority I have to do these things."