And you shall set the two stones on the shoulder pieces of the ephod, as stones of remembrance for the sons of Israel. And Aaron shall bear their names before the LORD on his two shoulders for remembrance.
to be a reminder to the people of Israel, so that no outsider, who is not of the descendants of Aaron, should draw near to burn incense before the LORD, lest he become like Korah and his company -- as the LORD said to him through Moses.