New King James Version

Exodus 39:21 New King James Version (NKJV)

And they bound the breastplate by means of its rings to the rings of the ephod with a blue cord, so that it would be above the intricately woven band of the ephod, and that the breastplate would not come loose from the ephod, as the Lord had commanded Moses.

Exodus 39

Exodus 39:13-31