Matthew 27:3-7

When Judas, His betrayer, saw that Jesus was condemned, he was gripped with remorse and returned the thirty pieces of silver to the chief priests and the elders, [Ex 21:32] saying, “I have sinned by betraying innocent blood.” They replied, “What is that to us? See to that yourself!” And throwing the pieces of silver into the temple sanctuary, he left; and went away and hanged himself. The chief priests, picking up the pieces of silver, said, “It is not lawful to put these in the treasury [of the temple], because it is the price of blood.” So after consultation they used the money to buy the Potter’s Field as a burial place for strangers.