Luke 22:47

For just as incurable wounds yield neither to severe nor soothing remedies, so the soul when once it is taken captive, and has sold itself to any particular sin, will reap no benefit from admonition. And so it was with Judas, who desisted not from His betrayal, though deterred by Christ by every manner of warning. Hence it follows, And drew near unto Jesus to kiss him. (Conc. 1. de Laz.) Now we must not depart from admonishing our brethren, albeit nothing comes of our words. For even the streams though no one drink therefrom still flow on, and him whom thou hast not persuaded to-day, peradventure thou mayest to-morrow. For the fisherman after drawing empty nets the whole day, when it was now late takes a fish. And thus our Lord, though He knew that Judas was not to be converted, yet ceased not to do such things as had reference to him. It follows, But Jesus said unto him, Judas, betrayest thou the Son of man with a kiss?

He says, he that was called Judas, holding his name as it were in abhorrence; but adds, one of the twelve, to signify the enormity of the traitor. For he who had been honoured as an apostle became the cause of the murder of Christ.

(non occ.) After first mentioning the prayer of Christ, St. Luke goes on to speak of His betrayal wherein He is betrayed by His disciple, saying, And while he yet spake, behold a multitude, and he that was called Judas.