Exodus 28:9-12

28:9 “You are to take two onyx stones and engrave on them the names of the sons of Israel, 28:10 six of their names on one stone, and the six remaining names on the second stone, according to the order of their birth. 28:11 You are to engrave the two stones with the names of the sons of Israel with the work of an engraver in stone, like the engravings of a seal; you are to have them set in gold filigree settings. 28:12 You are to put the two stones on the shoulders of the ephod, stones of memorial for the sons of Israel, and Aaron will bear their names before the Lord on his two shoulders for a memorial.

Exodus 28:21

28:21 The stones are to be for the names of the sons of Israel, twelve, according to the number of their names. Each name according to the twelve tribes is to be like the engravings of a seal.

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.