Zechariah is one of the most quoted OT prophets in the Gospels.  The thirty pieces of silver that Judas threw into the temple was prophesied in Zechariah 11.  We are told that Judas was remorseful, but was he repentant?  What is the difference?  And what difference might it have made if Judas had gone to Jesus, the true Priest, instead of to the false priests?  Where do you go to have your guilt removed?