Matthew 27:6

6 The chief priests picked up the coins and said, "This is blood money, and it is against our Law to put it in the Temple treasury."

Matthew 27:6 In-Context

4 "I have sinned by betraying an innocent man to death!" he said. "What do we care about that?" they answered. "That is your business!"
5 Judas threw the coins down in the Temple and left; then he went off and hanged himself.
6 The chief priests picked up the coins and said, "This is blood money, and it is against our Law to put it in the Temple treasury."
7 After reaching an agreement about it, they used the money to buy Potter's Field, as a cemetery for foreigners.
8 That is why that field is called "Field of Blood" to this very day.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.