"When the chief priests made their deal with Judas they didn’t realize they would be fulfilling a prophecy from Zechariah 11 in conspicuous detail."
"I told them, “If you think it best, give me my pay; but if not, keep it.” So they paid me thirty pieces of silver. And the LORD said to me, “Throw it to the potter”—the handsome price at which they priced me! So I took the thirty pieces of silver and threw them into the house of the LORD to the potter (Zechariah 11:12-13)"
"The price was the same, the location of the transaction was the same, even the ultimate recipient was the same. After Judas had betrayed the Lord, he was filled with remorse. He returned the money by throwing it at the chief priests in the Temple (Matt. 27:5). This caused them a problem. They couldn’t take it back into the treasury because it was tainted. Since they were responsible for burying any travelers who died in the city, they used the money to buy a field they could turn into a burial ground. The man they bought the field from was a potter by trade. Matt. 27:6-7."
Here is the verse in full: --"Then Judas, who betrayed him, seeing that he was condemned, repenting himself, brought back the thirty pieces of silver to the chief priests and ancients, saying: "I have sinned in betraying innocent blood." But they said: "What is that to us? Look thou to it." And casting down the pieces of silver in the temple, he departed, and went and hanged himself with a halter. But the chief priests, having taken the pieces of silver, said: "It is not lawful to put them into the corbona, because it is the price of blood." And after they had consulted together, they bought with them the potter's field, to be a burying place for strangers. For this the field was called Haceldama, that is, the field of blood, even to this day."
A potter's field is a place for the burial of unknown or indigent people. So, potter's field! Ta-DA! I love the bible, how it melds seamlessly into one story, both Old Testament and New.