Exodus 28:10-12

Young's Literal Translation

¹⁰ six of their names on the one stone, and the names of the remaining six on the second stone, according to their births;

¹¹ the work of an engraver in stone, openings of a signet, thou dost open the two stones by the names of the sons of Israel; turned round, embroidered [with] gold, thou dost make them.

¹² `And thou hast set the two stones on the shoulders of the ephod -- stones of memorial to the sons of Israel -- and Aaron hath borne their names before Jehovah, on his two shoulders, for a memorial.