The rings of the breastpiece shall be tied to the rings of the ephod with a cord of blue yarn, so that the breastpiece is above the waistband of the ephod and does not swing out from the ephod.
The most considerable of the ornaments of the high priest was this breast-plate, a rich piece of cloth, curiously wrought with gold and purple, etc., two spans long and a span broad, so that, being doubled, it was a span square, Exo 28:16.
Commenting on Exodus 28:15-30
And Aaron shall bear the names of the children of Israel in the breastplate of judgment upon his heart,.... Their names being engraven on the stones, and the stones put into the breastplate of judgment, and this breastplate hanging down upon the breast and heart of Aaron, he was a representative of the twelve tribes of Israel, as Christ his antitype is the representative of...
Exo 28:27-28 Two golden rings were also to be put “upon the shoulder-pieces of the ephod underneath, toward the fore-part thereof, near the joining above the girdle of it,” and to fasten the choshen from its (lower) rings to the (lower) rings of the ephod with threads of hyacinth, that it might be over the girdle (above it), and not move away (יזּח Niphal of...
Commenting on Exodus 28:27-28