“And when he was come into the temple, the chief priests and the elders of the people came unto him as he was teaching, and said, By what authority doest thou these things? and who gave thee this authority?”
Matthew 21:23 — Greek Interlinear
Church Fathers on Matthew 21:23
The Priests were tormented with jealousy, because they had seen Christ entering the Temple in great glory. And not being able to master the fire of jealousy which burnt in their breasts, they break forth in speech.
Forasmuch as they could not detract from His miracles, they bring matter of blame from His forbidding to sell in the Temple. As though they had said, Hast Thou assumed the seat of authority? Hast Thou been anointed Priest, that Thou exertest this power?
Or in these words they urge the same cavil as above, when they said, 'He casteth out demons through Beelzebub the Prince of the demons.' [Matt 12:24] For when they say, 'By what authority doest thou thee things?' they doubt concerning the power of God, and would have it understood that the things He does are of the Devil. But when they add, 'Who gave thee this authority?' they most clearly deny the Son of God, whom they suppose to work miracles, not by His own, but by others'…