Exodus 39:21-23

Darby Translation

²¹ And they bound the breastplate with its rings to the rings of the ephod with lace of blue, that it might be above the girdle of the ephod, and that the breastplate might not be loosed from the ephod; as Jehovah had commanded Moses.

²² And he made the cloak of the ephod of woven work, all of blue;

²³ and the opening of the cloak in its middle, as the opening of a coat of mail; a binding was round about the opening, that it should not rend.