Exodus 28:4

28:4 Now these are the garments that they are to make: a breastpiece, an ephod, a robe, a fitted tunic, a turban, and a sash. They are to make holy garments for your brother Aaron and for his sons, that they may minister as my priests.

Exodus 28:30

28:30 “You are to put the Urim and the Thummim into the breastpiece of decision; and they are to be over Aaron’s heart when he goes in before the Lord. Aaron is to bear the decisions of the Israelites over his heart before the Lord continually.

Exodus 39:8

The Breastpiece of Decision

39:8 He made the breastpiece, the work of an artistic designer, in the same fashion as the ephod, of gold, blue, purple, and scarlet, and fine twisted linen.

Leviticus 8:8

8:8 He then set the breastpiece on him and put the Urim and Thummim into the breastpiece.