Exodus 29:5-15

5 Take 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.
6 Put his turban on him, and fasten the holy crown to it.
7 Take the anointing oil, pour it on his head, and anoint him.
8 "Have his sons come forward. Dress them in their linen robes,
9 and 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.
10 "Then bring the young bull to the front of the tent of meeting. Aaron and his sons will place their hands on its head.
11 Slaughter the bull in the LORD's presence at the entrance to the tent of meeting.
12 Take some of the bull's blood, and put it on the horns of the altar with your finger. Pour the rest of it out at the bottom of the altar.
13 "Then take all the fat that covers the internal organs, the lobe of the liver, and the two kidneys with the fat on them, and burn them on the altar.
14 But burn the bull's meat, skin, and excrement outside the camp. It is an offering for sin.
15 "Take one of the rams. Then Aaron and his sons will place their hands on its head.