Exodus 39
20 Ref They made two rings of gold, and put them on the two shoulder-pieces of the ephod underneath, in the front of it, close by its coupling, above the skillfully woven band of the ephod.
21 Ref They bound the breastplate by its rings to the rings of the ephod with a lace of blue, that it might be on the skillfully woven band of the ephod, and that the breastplate might not come loose from the ephod, as Yahweh commanded Moses.