Exodus 28:27

“And two other rings of gold thou shalt make, etc.] This is the third pair of rings ordered to be made, the two other pair were for the four ends or corners of the breastplate, but this pair was for the ephod: and shalt put them on the two sides of the ephod; one on the right and the other on the left: underneath, towards the fore part thereof; underneath the ephod, yet towards the fore part of it; or rather on the fore part of it, though so as the rings could not be seen: over against the other coupling thereof; either so as to answer to the other coupling of the breastplate to the shoulder pieces of the ephod above; or to the rings at the ends of the breastplate below, with which these were…”

“(Compare Exodus 39:1-31.) Moses is now commanded to commit all that pertains to the offerings made to the Lord in the sanctuary to the exclusive charge of the members of a single family, who were to hold their office from generation to generation. In the patriarchal times, the external rites of worship had generally been conducted by the head of the tribe or family, in accordance with the principle involved in the dedication of the firstborn Exodus 13:2; Numbers 3:12-13. Moses, as the divinely-appointed and acknowledged leader of the nation, had, on a special occasion, appointed those who were to offer sacrifice, and had himself sprinkled the consecrating blood of the victims on the people…”

“the curious girdle: Exo 28:8 Exodus 28:28”

“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 זחח, in Arabic removit), i.e., that it might keep its place above the girdle and against the ephod without shifting. Exodus 28:29”