Cyprian

He is the One who, although he was silent in his passion, will not be silent finally in the day of reckoning. He is our God, even if unrecognized. He is already known among the faithful and all who believe. When he comes manifesting himself in his second coming, he will not be silent. For although he was formerly hidden in humility, he will come manifested in power.

Treatise IX. On the Advantage of Patience 23 ↗

Augustine of Hippo

It is found, in comparing the narratives of all the evangelists, that this silence on the part of our Lord Jesus Christ took place more than once, both before the chief priests and before Herod, to whom, as Luke intimates, Pilate had sent Him for a hearing, and before Pilate himself; so that it was not in vain that the prophecy regarding Him had preceded, "As the lamb before its shearer was dumb, so He opened not His mouth," especially on those occasions when He answered not His questioners. …

Tractates On John 116.4 ↗

Bede

There follows: But Jesus yet answered nothing; so that Pilate marvelled. He was unwilling to give an answer, lest He should clear Himself of the charge, and be acquitted by the judge, and so the gain resulting from the Cross should be done away.

Catena Aurea by Aquinas ↗