Matthew 27:3-6

3Then Judas, who had betrayed him, when he saw that he was condemned, repented, and brought again the thirty pieces of silver to the chief priests and elders,

4Saying, I have sinned in that I have betrayed innocent blood. And they said, What is that to us? see thou to that .

5And he cast down the pieces of silver in the temple, and departed, and went and hanged himself.

6And the chief priests took the silver pieces, and said, It is not lawful to put them into the treasury, because it is the price of blood.