Then Judas, which had betrayeth him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders, Saying, I have sinned in that I have betrayed the innocent blood.And they said, What is that to us? see thou to that.And he cast down the pieces of silver in the temple, and departed, and went and hanged himself.And the chief priests took the silver pieces, and said, It is not lawful for to put them into the treasury, because it is the price of blood. And they took counsel, and bought with them the potter’s field, to bury strangers in. Wherefore that field was called, The field of blood, unto this day.Then was fulfilled that which was spoken by the prophet, saying, And they took the thirty pieces of silver, the price of him that was valued. (Zec 11:12-13)
"In the fullest manner Judas acknowledged to the chief priests that he had sinned, and betrayed an innocent person. This was full testimony to the character of Christ; but the rulers were hardened. Casting down the money, Judas departed, and went and hanged himself, not being able to bear the terror of Divine wrath, and the anguish of despair.
There is little doubt but that the death of Judas was before that of our blessed Lord. But was it nothing to them that they had thirsted after this blood, and hired Judas to betray it, and had condemned it to be shed unjustly? Thus do fools make a mock at sin. Thus many make light of Christ crucified. But the judgment of God is according to truth.
Many apply this passage of the buying the piece of ground, with the money Judas brought back, to signify the favour intended by the blood of Christ to strangers, and sinners of the Gentiles.
Judas went far toward repentance, yet it was not to salvation. He confessed, but not to God; he did not go to him, and say, I have sinned, Father, against heaven. Let none be satisfied with such partial convictions as a man may have, and yet remain full of pride, enmity, and rebellion."