Exodus 28:21-23

American Standard Version

²¹ And the stones shall be according to the names of the children of Israel, twelve, according to their names; like the engravings of a signet, every one according to his name, they shall be for the twelve tribes. ²² And thou shalt make upon the breastplate chains like cords, of wreathen work of pure gold. ²³ And thou shalt make upon the breastplate two rings of gold, and shalt put the two rings on the two ends of the breastplate.