But the chief priests took the silver pieces and said: ‘It is not lawful to drop them into the sacred treasury, because they are the price of blood.’

The priests merely acted for Judas in taking the money out of the temple sanctuary where Judas had thrown the thirty silver shekels and conveyed it to the seller of the potter’s field. The priests saw the unfitness of dropping the “price of blood” into the temple treasury, but at the same time they thought themselves fit to serve in that temple in spite of their having caused that blood to be shed.