15 And thou shalt take one of the rams, and Aaron and his sons shall put their hands upon the head of the ram; 16 and thou shalt slaughter the ram, and shalt take its blood, and sprinkle [it] on the altar round about. 17 And thou shalt cut up the ram into its pieces, and wash its inwards, and its legs, and put [them] upon its pieces, and upon its head; 18 and thou shalt burn the whole ram upon the altar: it is a burnt-offering to Jehovah—a sweet odour; it is an offering by fire to Jehovah.
Matthew Henry's Commentary on Exodus 29:15-18
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.