John 18:39

This custom was not commanded in the law, but had been handed down by tradition from the old fathers, viz. that in remembrance of their deliverance out of Egypt, they should release a prisoner at the passover. Pilate tries to persuade them: Will ye therefore that I release unto you the King of the Jews.

When then He says, Will ye that I release unto you the King of the Jews? he clears Jesus of all guilt, and mocks the Jews, as if to say, Him whom ye accuse of thinking Himself a King, the same I bid you release: He does no such thing.

"What is truth?" But for the present he applieth himself to what was pressing, for he knew that this question needed time, and desired to rescue Him from the violence of the Jews. Wherefore he went out, and what said he? "I find no fault in him." Consider how prudently he acted. He said not, "Since he hath sinned, and is deserving of death, forgive him on account of the Feast"; but having first acquitted Him of all guilt, he asks them over and above, if they were not minded to dismiss Him as innocent, yet as guilty to forgive Him on account of the time. Wherefore he added, "Ye have a custom that I should release unto you one at the Passover"; then in a persuasory way, "Will ye therefore that I release the king of the Jews? Then cried they all, Not this man, but Barabbas." O accursed decision! They demand those like mannered with themselves, and let the guilty go; but bid him punish the innocent. For this was their custom from old time.

(Tr. cxv) After Pilate had asked, What is truth? he remembered a custom of the Jews, of releasing one prisoner at the passover, and did not wait for Christ's answer, for fear of losing this chance of saving Him, which he much wished to do: And when he had said this, he went out again unto the Jews. (Tr. cxv) He could not dismiss the idea from his mind, that Jesus was King of the Jews; as if the Truth itself, whom he had just asked what it was, had inscribed it there as a title.