Exodus 39:5

And the curious girdle of his ephod, that was upon it, was of the same, according to the work thereof; of gold, blue, and purple, and scarlet, and fine twined linen; as the Lord commanded Moses.

Cross-reference

Exodus 28:8 commands a skillfully woven band made of one piece with the ephod; this verse confirms it was done as commanded.

Revelation 1:13 depicts Christ with a golden sash, echoing the high priest's ephod band and typifying His priestly role.