Exodus 28 12
Attach both stones to the shoulder pieces of the ephod as reminders for the Israelite tribes. Aaron is to wear their names on his two shoulders to remind the Israelites that he represents them when he goes into the Lord's presence.
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ASV Exodus 28:12And thou shalt put the two stones upon the shoulder-pieces of the ephod, to be stones of memorial for the children of Israel: and Aaron shall bear their names before Jehovah upon his two shoulders for a memorial.
WEB Exodus 28:12You shall put the two stones on the shoulder straps of the ephod, to be stones of memorial for the children of Israel. Aaron shall bear their names before Yahweh on his two shoulders for a memorial.
NKJ Exodus 28:12And you shall put the two stones on the shoulders of the ephod as memorial stones for the sons of Israel. So Aaron shall bear their names before the Lord on his two shoulders as a memorial.