Exodus 28:6-12

⁶“They shall also make the ephod of gold, of violet, purple, and scarlet material, and fine twisted linen, the work of the skilled embroiderer. ⁷It shall have two shoulder pieces joined to its two ends, so that it may be joined. ⁸The skillfully woven band of its overlay, which is on it, shall be like its workmanship, of the same material: of gold, of violet and purple and scarlet material and fine twisted linen. ⁹And you shall take two onyx stones and engrave on them the names of the sons of Israel, ¹⁰six of their names on the one stone and the names of the remaining six on the other stone, according to their birth. ¹¹As a jeweler engraves a signet, you shall engrave the two stones according to the names of the sons of Israel; you shall set them in filigree settings of gold. ¹²And you shall put the two stones on the shoulder pieces of the ephod, as stones of memorial for the sons of Israel, and Aaron shall carry their names before the Lord on his two shoulders as a memorial.