Matthew 27:3-5

3 Then Judas, who betrayed him, when he saw that Jesus was condemned, felt remorse, and brought back the thirty pieces of silver to the chief priests and elders,  4 saying, "I have sinned in that I betrayed innocent blood."  But they said, "What is that to us? You see to it."

5 He threw down the pieces of silver in the sanctuary, and departed. He went away and hanged himself.