Cross reference
Leviticus 27:4
4 And if it be a female, then thy estimation shall be thirty shekels.
Zechariah 11:12-13
12 And I said unto them, If ye think good, give me my hire; and if not, forbear. So they weighed for my hire thirty `pieces' of silver.
13 And Jehovah said unto me, Cast it unto the potter, the goodly price that I was prized at by them. And I took the thirty `pieces' of silver, and cast them unto the potter, in the house of Jehovah.
Matthew 26:15
15 and said, What are ye willing to give me, and I will deliver him unto you? And they weighed unto him thirty pieces of silver.
Matthew 27:9-10
9 Then was fulfilled that which was spoken through Jeremiah the prophet, saying, And they took the thirty pieces of silver, the price of him that was priced, whom `certain' of the children of Israel did price;
10 and they gave them for the potter's field, as the Lord appointed me.