Exodus 28:27-28

27Make two more gold rings and attach them to the bottom of the ephod’s two shoulder pieces on its front, close to its seam, and above the ephod’s woven waistband.

28The artisans are to tie the breastpiece from its rings to the rings of the ephod with a cord of blue yarn, so that the breastpiece is above the ephod’s waistband and does not come loose from the ephod.