Exodus 39:7-9

Revised Standard Version

⁷ And he set them on the shoulder-pieces of the ephod, to be stones of remembrance for the sons of Israel; as the Lord had commanded Moses.

⁸ He made the breastpiece, in skilled work, like the work of the ephod, of gold, blue and purple and scarlet stuff, and fine twined linen. ⁹ It was square; the breastpiece was made double, a span its length and a span its breadth when doubled.