"Why was not this perfume sold for thirty pounds, and the money given to poor people?"

And said "What are you willing to give me, if I betray Jesus to you?" The Priests 'weighed him out thirty pieces of silver' as payment.

Then Judas, who betrayed him, seeing that Jesus was condemned, repented of what he had done, and returned the thirty pieces of silver to the Chief Priests and Councillors.

Then it was that these words spoken by the Prophet Jeremiah were fulfilled-- 'They took the thirty pieces of silver, the price of him who was valued, whom some of the people of Israel valued,