Matthew 27:3-7

Then Judas, who betrayed him, when he saw that he was condemned, repented himself, and brought back the thirty pieces of silver to the chief priests and elders, saying, I have sinned in that I betrayed innocent blood. But they said, What is that to us? see thou to it. And he cast down the pieces of silver into the sanctuary, and departed; and he went away and hanged himself. And the chief priests took the pieces of silver, and said, It is not lawful to put them into the treasury, since it is the price of blood. And they took counsel, and bought with them the potter’s field, to bury strangers in.