Exodus 28:29-30

28:29 Aaron will bear the names of the sons of Israel in the breastpiece of decision over his heart when he goes into the holy place, for a memorial before the Lord continually.

28:30 “You are to put the Urim and the Thummim into the breastpiece of decision; and they are to be over Aaron’s heart when he goes in before the Lord. Aaron is to bear the decisions of the Israelites over his heart before the Lord continually.