13 You shall take all the fat that covers the entrails, and the appendage of the liver, and the two kidneys with the fat that is on them, and turn them into smoke on the altar. 14 But the flesh of the bull, and its skin, and its dung, you shall burn with fire outside the camp; it is a sin offering. 15 Then you shall take one of the rams, and Aaron and his sons shall lay their hands on the head of the ram, 16 and you shall slaughter the ram, and shall take its blood and dash it against all sides of the altar. 17 Then you shall cut the ram into its parts, and wash its entrails and its legs, and put them with its parts and its head, 18 and turn the whole ram into smoke on the altar; it is a burnt offering to the Lord; it is a pleasing odor, an offering by fire to the Lord. 19 You shall take the other ram; and Aaron and his sons shall lay their hands on the head of the ram, 20 and you shall slaughter the ram, and take some of its blood and put it on the lobe of Aaron's right ear and on the lobes of the right ears of his sons, and on the thumbs of their right hands, and on the big toes of their right feet, and dash the rest of the blood against all sides of the altar. 21 Then you shall take some of the blood that is on the altar, and some of the anointing oil, and sprinkle it on Aaron and his vestments and on his sons and his sons' vestments with him; then he and his vestments shall be holy, as well as his sons and his sons' vestments. 22 You shall also take the fat of the ram, the fat tail, the fat that covers the entrails, the appendage of the liver, the two kidneys with the fat that is on them, and the right thigh (for it is a ram of ordination),
Matthew Henry's Commentary on Exodus 29:13-22
Commentary on Exodus 29:1-37
(Read Exodus 29:1-37)
Aaron and his sons were to be set apart for the priest's office, with ceremony and solemnity. Our Lord Jesus is the great High Priest of our profession, called of God to be so; anointed with the Spirit, whence he is called Messiah, the Christ; clothed with glory and beauty; sanctified by his own blood; made perfect, or consecrated through sufferings, Matthew 12:28,) and by him the merit of Christ is applied to our souls. This consecration signifies the admission of a sinner into the spiritual priesthood, to offer spiritual sacrifices, acceptable to God through Jesus Christ.