Mark 11:27-33

27 They arrived once again in Jerusalem. As Jesus was walking in the Temple, the chief priests, the teachers of the Law, and the elders came to him 28 and asked him, "What right do you have to do these things? Who gave you such right?"

29 Jesus answered them, "I will ask you just one question, and if you give me an answer, I will tell you what right I have to do these things. 30 Tell me, where did John’s right to baptize come from: was it from God or from human beings?"

31 They started to argue among themselves: "What shall we say? If we answer, ‘From God,’ he will say, ‘Why, then, did you not believe John?’ 32 But if we say, ‘From human beings …’" (They were afraid of the people, because everyone was convinced that John had been a prophet.) 33 So their answer to Jesus was, "We don’t know."

Jesus said to them, "Neither will I tell you, then, by what right I do these things."