Once Jesus is delivered to Pontius Pilate, Judas returns the thirty pieces of silver to the Sanhedrin then hangs himself. Pieces of silver refers to shekels, important to Jews as the official coinage of the Temple, minted in Tyre. Although these coins featured pagan imagery they were of standard weight, purity and easily available.
1 When the morning was come, all the chief priests and elders of the people took counsel against Jesus to put him to death:
2 And when they had bound him, they led him away, and delivered him to Pontius Pilate the governor.
3 Then Judas, which had betrayed him, when he saw that he was condemned, repented himself, and brought again the thirty pieces of silver to the chief priests and elders,
4 Saying, I have sinned in that I have betrayed the innocent blood. And they said, What is that to us? see thou to that.
5 And he cast down the pieces of silver in the temple, and departed, and went and hanged himself.