Mark 11:29-33
11:29 Jesus said to them, “I will ask you one question. Answer me and I will tell you by what authority I do these things:
11:30 John’s baptism – was it from heaven or from people? Answer me.”
11:31 They discussed with one another, saying, “If we say, ‘From heaven,’ he will say, ‘Then why did you not believe him?’
11:32 But if we say, ‘From people – ’” (they feared the crowd, for they all considered John to be truly a prophet).
11:33 So they answered Jesus, “We don’t know.” Then Jesus said to them, “Neither will I tell you by what authority I am doing these things.”