13 And 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 burn them upon 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 upon the head of the ram, 16 and you shall slaughter the ram, and shall take its blood and throw it against the altar round about. 17 Then you shall cut the ram into pieces, and wash its entrails and its legs, and put them with its pieces and its head, 18 and burn the whole ram upon 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 upon the head of the ram, 20 and you shall kill the ram, and take part of its blood and put it upon the tip of the right ear of Aaron and upon the tips of the right ears of his sons, and upon the thumbs of their right hands, and upon the great toes of their right feet, and throw the rest of the blood against the altar round about. 21 Then you shall take part of the blood that is on the altar, and of the anointing oil, and sprinkle it upon Aaron and his garments, and upon his sons and his sons' garments with him; and he and his garments shall be holy, and his sons and his sons' garments with him. 22 "You shall also take the fat of the ram, and the fat tail, and the fat that covers the entrails, and the appendage of the liver, and 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.