Parallel
Exodus 39:21
Jewish Publication Society 1917 · Berean Standard Bible
And they did bind the breastplate by the rings thereof unto the rings of the ephod with a thread of blue, that it might be upon the skilfully woven band of the ephod, and that the breastplate might not be loosed from the ephod; as the LORD commanded Moses.
Then they tied the rings of the breastpiece to the rings of the ephod with a cord of blue yarn, so that the breastpiece was above the waistband of the ephod and would not swing out from the ephod, just as the LORD had commanded Moses.