Exodus 28:34

30 And place the Urim and Thummim in the breastpiece of judgment, so that they will also be over Aaron’s heart whenever he comes before the LORD. Aaron will continually carry the judgment of the sons of Israel over his heart before the LORD.

31 You are to make the robe of the ephod entirely of blue cloth,

32 with an opening at its top in the center. Around the opening shall be a woven collar with an opening like that of a garment, so that it will not tear.

33 Make pomegranates of blue, purple, and scarlet yarn all the way around the lower hem, with gold bells between them,

34 alternating the gold bells and pomegranates around the lower hem of the robe.

35 Aaron must wear the robe whenever he ministers, and its sound will be heard when he enters or exits the sanctuary before the LORD, so that he will not die.

36 You are to make a plate of pure gold and engrave on it as on a seal: HOLY TO THE LORD.

37 Fasten to it a blue cord to mount it on the turban; it shall be on the front of the turban.

38 And it will be worn on Aaron’s forehead, so that he may bear the iniquity of the holy things that the sons of Israel consecrate with regard to all their holy gifts. It shall always be on his forehead, so that they may be acceptable before the LORD.

Read all of Exodus 28