29 Jesus said to them, "Let me ask you one question, and if you answer me, I will tell you what authority I have for doing as I do.
Mark 11:29 Cross References - Goodspeed
Matthew 21:24
24 Jesus answered, "Let me ask you one question, and if you answer it, I will tell you what authority I have for doing as I do.
Luke 20:3-8
3 He said to them, "I will ask you a question too.
4 Tell me, did John's baptism come from heaven or from men?"
5 And they argued with one another, and said, "If we say 'From heaven,' he will say, 'Why did you not believe him?'
6 But if we say, 'From men,' all the people will stone us to death, for they are convinced that John was a prophet."
7 So they answered that they did not know where it came from.
8 And Jesus said to them, "Nor will I tell you what authority I have for doing as I do."