Exodus 28:4

onyx stones, and setting stones for the ephod and for the breastpiece.

“For Aaron’s sons you shall make tunics; you shall also make sashes for them, and you shall make caps for them, for glory and for beauty.

and you shall set the turban on his head and put the holy crown on the turban.

And he put the tunic on him and girded him with the sash and clothed him with the robe and put the ephod on him; and he girded him with the skillfully woven band of the ephod, with which he tied it to him.

‘And did I not choose them from all the tribes of Israel to be My priests, to go up to My altar, to burn incense, to carry an ephod before Me; and did I not give to the house of your father all the fire offerings of the sons of Israel?

For the sons of Israel will remain for many days without king or prince, without sacrifice or sacred pillar, and without ephod or household idols.