Theophylact of Ohrid

In order to more strongly convict the Jews, the Lord also brings forward a prophet who condemns them. They accused the disciples for transgressing the tradition of the elders, but the Lord directs against them a far stronger accusation, namely, that they transgress the Law of Moses.

Commentary on Mark ↗

Clement of Alexandria

The Lord Himself shall teach us that Judas the deceitful is meant: "He that dippeth with Me in the dish, the same shall betray Me." You see the treacherous guest, and this same Judas betrayed the Master with a kiss. For he was a hypocrite, giving a treacherous kiss, in imitation of another hypocrite of old. …

The Instructor Book 2 ↗

Clement of Rome

So let us devote ourselves to those at peace in their devotion to God, and not to those who seek peace through hypocrisy. For he says in one place: "This people honors me with their lips, but their heart is far from me." And again: "They blessed with their mouth, but they cursed in their heart." And again he says: "They flattered him with their mouths; they lied to him with their tongues. Their heart was not steadfast toward him; they were not true to his covenant."

1 Clement 15.1-4 ↗