King James Version (KJV) - Exodus 39:21 >

And they did bind the breastplate by his rings unto the rings of the ephod with a lace of blue, that it might be above the curious girdle of the ephod, and that the breastplate might not be loosed from the ephod; as the LORD commanded Moses.

Jewish Publication Society of America Version (JPS1917) - Exodus 39:21 >

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.