Exodus 29:4-9

4“Then bring Aaron and his sons to the entrance of the tent of meeting, and wash them.

5Take the clothes, and put them on Aaron—the linen robe, the ephod and the robe that is worn with it, and the breastplate. Use the belt to tie it on him tightly.

6Put his turban on him, and fasten the holy crown to it.

7Take the anointing oil, pour it on his head, and anoint him.

8“Have his sons come forward. Dress them in their linen robes,

9and put turbans on them. Tie belts around the waists of Aaron and his sons. They alone are to be priests; this is a permanent law. In this way you will ordain Aaron and his sons.