When He entered the temple complex, the chief priests and the elders of the people came up to Him as He was teaching and said, "By what authority are You doing these things? Who gave You this authority?"
References for Matthew 21:23
Jesus answered them, "I will also ask you one question, and if you answer it for Me, then I will tell you by what authority I do these things.
Where did John's baptism come from? From heaven or from men?" They began to argue among themselves, "If we say, 'From heaven,' He will say to us, 'Then why didn't you believe him?'
But if we say, 'From men,' we're afraid of the crowd, because everyone thought John was a prophet."
So they answered Jesus, "We don't know." And He said to them, "Neither will I tell you by what authority I do these things.