Exodus 39:21-23

Expanded Bible

²¹ They used a blue ·ribbon [cord] and tied the rings of the ·chest covering [breastpiece] to the rings of the ·holy vest [ephod], connecting it to the ·woven belt [^Lembroidered waistband]. In this way the ·chest covering [breastpiece] would not ·swing out [get loose] from the ·holy vest [ephod]. They did all these things the way the Lord commanded.

²² Then they made the outer robe ·to be worn under the holy vest [^Lof the ephod]. It was woven only of blue cloth. ²³ They made a ·hole [opening] in the center of the outer robe, with a woven collar ·sewn around it [^Llike a coat of mail; ^Cthe Hebrew is obscure] so it would not tear.