Exodus 28:13-28:30

Then make frames of gold and two chains of pure gold; braid these like corded work, and fasten the corded chains to the frames. You shall make a breastpiece of decision, worked into a design; make it in the style of the ephod: make it of gold, of blue, purple, and crimson yarns, and of fine twisted linen. It shall be square and doubled, a span in length and a span in width. Set in it mounted stones, in four rows of stones. The first row shall be a row of carnelian, chrysolite, and emerald; the second row: a turquoise, a sapphire, and an amethyst; the third row: a jacinth, an agate, and a crystal; and the fourth row: a beryl, a lapis lazuli, and a jasper. They shall be framed with gold in their mountings. The stones shall correspond [in number] to the names of the sons of Israel: twelve, corresponding to their names. They shall be engraved like seals, each with its name, for the twelve tribes. On the breastpiece make braided chains of corded work in pure gold. Make two rings of gold on the breastpiece, and fasten the two rings at the two ends of the breastpiece, attaching the two golden cords to the two rings at the ends of the breastpiece. Then fasten the two ends of the cords to the two frames, which you shall attach to the shoulder-pieces of the ephod, at the front. Make two rings of gold and attach them to the two ends of the breastpiece, at its inner edge, which faces the ephod. And make two other rings of gold and fasten them on the front of the ephod, low on the two shoulder-pieces, close to its seam above the decorated band. The breastpiece shall be held in place by a cord of blue from its rings to the rings of the ephod, so that the breastpiece rests on the decorated band and does not come loose from the ephod. Aaron shall carry the names of the sons of Israel on the breastpiece of decision over his heart, when he enters the sanctuary, for remembrance before the Lord at all times. Inside the breastpiece of decision you shall place the Urim and Thummim, so that they are over Aaron's heart when he comes before the Lord. Thus Aaron shall carry the instrument of decision for the Israelites over his heart before the Lord at all times.