Exodus 39:21-23

Holman Christian Standard Bible

²¹ Then they tied the breastpiece from its rings to the rings of the ephod with a cord of blue yarn, so that the breastpiece was above the ephod’s waistband and did not come loose from the ephod. They did just as the Lord had commanded Moses.

Making the Robe

²² They^(A) made the woven robe of the ephod entirely of blue yarn. ²³ There was an opening in the center of the robe like that of body armor^[a] with a collar around the opening so that it would not tear.