Exodus 28:30-32

Amplified Bible

³⁰ In the breastpiece of judgment you shall put the ^[a]Urim (Lights) and the Thummim (Perfections) [to be used for determining God’s will in a matter]. They shall be over Aaron’s heart whenever he goes before the Lord, and Aaron shall always carry the judgment (verdict, judicial decisions) of the sons of Israel over his heart before the Lord.

³¹ “And you shall make the ^[b]robe of the ephod all of blue. ³² There shall be an opening at its top in the center [for the head], with a binding of woven work around the opening, like the opening in a coat of armor, so that it will not tear or fray.