Exodus 39 7
They attached both stones to the shoulder pieces of the ephod as reminders for the Israelite tribes, as the Lord had ordered Moses to do.
Compare with other 3 random translations
KJV Exodus 39:7And he put them on the shoulders of the ephod, that they should be stones for a memorial to the children of Israel; as the Lord commanded Moses.
AMP Exodus 39:7And he put them on the shoulder pieces of the ephod to be memorial stones (a remembrance) for the sons of Israel (Jacob), just as the Lord had commanded Moses.
GNV Exodus 39:7And put them on the shoulders of the Ephod, as stones for a remembrance of the children of Israel, as the Lord had commanded Moses.