Fasten both stones on the shoulder pieces of the ephod as memorial stones for the sons of Israel. Aaron is to bear their names on his two shoulders as a memorial before the LORD.
KJV
And thou shalt put the two stones upon the shoulders of the ephod [for] stones of memorial unto the children of Israel: and Aaron shall bear their names before the LORD upon his two shoulders for a memorial.
ASV
And 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.