שמות, פרק ל״ט, פסוק ח׳

The creation of the breastplate was a work of profound artistry, executed with the specialized skill of a master weaver. The construction of this intricate piece mirrored the creation of the ephod perfectly. The artisans fashioned it using the exact same methods and techniques required for the ephod itself.

In doing so, they relied on an identical set of materials. The creators carefully wove together gold, blue, purple, and scarlet yarn, combining them with fine twisted linen to complete the work.