Exodus 28:21-23

Young's Literal Translation

²¹ and the stones are according to the names of the sons of Israel, twelve, according to their names, openings of a signet, each by his name are they for the twelve tribes.

²² `And thou hast made on the breastplate wreathed chains, work of thick bands, of pure gold;

²³ and thou hast made on the breastplate two rings of gold, and hast put the two rings on the two ends of the breastplate;