Jerome — as excerpted in the Catena Aurea on Matthew 21:23-27

“What the Priests revolved in their malice is shewn when he adds, But they reasoned with themselves. For had they replied that it was from heaven, the question was inevitable, Why then were ye not baptized by John? But should they reply that it was an invention of human device, and had in it nothing divine, they feared a tumult among the people. For all the assembled multitudes had received John’s baptism, and held him accordingly for a Prophet. This godless party therefore make answer, and by a seeming humility of speech confessing that they know not, turned to hide their insidious designs. And they answered Jesus, and said, We know not. In saying that they knew not, they lied; and it might have followed upon their answering thus, that the Lord also should say, I know not; but truth cannot lie, and therefore it follows, And he said unto them, Neither tell I you by what authority I do these things. This shews that they knew, but would not answer, and that He also knew, but would not answer, because they would not speak what they knew.”