Matthew 21: 23-27
23 And when he was come into the temple, there came to him, as he was teaching, the chief priests and ancients of the people, saying: By what authority dost thou these things? and who hath given thee this authority?

24 Jesus answering, said to them: I also will ask you one word, which if you shall tell me, I will also tell you by what authority I do these things.

25 The baptism of John, whence was it? from heaven or from men? But they thought within themselves, saying:

26 If we shall say, from heaven, he will say to us: Why then did you not believe him? But if we shall say, from men, we are afraid of the multitude: for all held John as a prophet.

27 And answering Jesus, they said: We know not. He also said to them: Neither do I tell you by what authority I do these things.