Matthew 27:3-8

Judas, the one who had given Jesus to his enemies, saw that they had decided to kill Jesus. Then he was very sorry for what he had done. So he took the thirty silver coins back to the priests and the leaders, saying, “I sinned; I handed over to you an innocent man.” The leaders answered, “What is that to us? That’s your problem, not ours.” So Judas threw the money into the Temple. Then he went off and hanged himself. The leading priests picked up the silver coins in the Temple and said, “Our law does not allow us to keep this money with the Temple money, because it has paid for a man’s death.” So they decided to use the coins to buy Potter’s Field as a place to bury strangers who died in Jerusalem. That is why that field is still called the Field of Blood.