Exodus 39:3-7

3Then Bezalel and Oholiab hammered the gold [into thin sheets] and cut it into threads to work into the blue, purple, and scarlet fabric, and into the fine linen, the work of a skilled craftsman.

4They made attaching shoulder pieces for the ephod; it was attached at its two [upper] edges.

5The skillfully woven sash with which to bind it, which was on the ephod [to hold it in place], was like its workmanship, of the same material: of gold and of blue, purple, and scarlet fabric, and fine twisted linen, just as the Lord had commanded Moses.

6They made the onyx stones, set in settings of gold filigree; they were engraved as signets are engraved, with the names of [the twelve tribes of] the sons of Israel.

7And he put them on the shoulder pieces of the ephod to be memorial stones (a remembrance) for the sons of Israel (Jacob), just as the Lord had commanded Moses.