שמות, פרק ל״ט, פסוק כ״א

The preparation of the priestly garments required exactness and care, ensuring that the heavy, ornate pieces rested securely on the High Priest during his service. The practical assembly involved firmly tying the Breastpiece to the Ephod. The upper rings of the Breastpiece were bound to the shoulder pieces, while the lower rings were attached directly to the Ephod itself [ביאור שטיינזלץ]. The purpose of this tight binding was to ensure the Breastpiece would never shift from its proper place. This requirement is also understood as a strict rule forbidding the separation of the Breastpiece from the Ephod [ביאור שטיינזלץ].

This physical connection represents a constant, ongoing state rather than a temporary arrangement [חזקוני]. Beyond the practical need to keep the clothing in place, this permanent bond carries a moral message for the High Priest. Wearing such magnificent and glorious garments could easily lead to feelings of superiority. The firm, unchanging placement of the Breastpiece serves as a personal reminder for the priest to maintain his humility and guard his mind against arrogance [שפתי כהן].

The completion of this intricate work is confirmed with the note that it was done exactly as God commanded Moses. This specific reminder is often included in the text when the practical execution of a task involves slight changes or new methods compared to the original instructions given by Him [העמק דבר].