Cyril of Alexandria

When Christ spoke this, the company of the Pharisees were very wroth, uttering shameful words; as it follows, Then said they, What need we any further witness?

Catena Aurea by Aquinas ↗

Theophylact of Ohrid

From this it is also evident that the obstinate receive no benefit from having mysteries revealed to them, but rather incur far greater condemnation. Therefore one must conceal these things from such people, for this is in fact the more compassionate thing to do.

Commentary on Luke ↗

Bede

But they said: What further need do we have for testimony? For we have heard it ourselves from his own mouth. They accepted the testimony of the Lord, who himself said that he was Christ and the Son of God, in that he said: The Son of Man will be sitting at the right hand of the power of God. And to those asking: Are you then the Son of God? He answered: You say that I am. They therefore condemn themselves by their own judgment, who hand over to death him whom they know by the testimony of their own words and deeds to be God. …

On the Gospel of Luke ↗

Bonaventure

Fourth, as to their malice in passing judgment, he subjoins: But they said: What further testimony do we desire? For we ourselves have heard it from his mouth. From which their perversity is apparent, because they were seeking with evil intent, namely "That they might catch him in his speech." It also appears that the perversity of their will perverted their judgment, because what Christ had said tentatively they accused him of having asserted. …

Commentary on Luke, Chapter 22 ↗