19 Then take the other sheep; and after Aaron and his sons have put their hands on its head, 20 You are to put the sheep to death, and take some of its blood and put it on the point of Aaron's right ear, and of the right ears of his sons, and on the thumbs of their right hands and the great toes of their right feet, dropping the rest of the blood on the sides of the altar. 21 Then take some of the blood on the altar, and the oil, and put it on Aaron and his robes and on his sons and on their robes, so that he and his robes and his sons and their robes may be made holy. 22 Then take the fat of the sheep, the fat tail, the fat covering the insides, and the fat joining the liver and the two kidneys with the fat round them, and the right leg; for by the offering of this sheep they are to be marked out as priests:
Matthew Henry's Commentary on Exodus 29:19-22
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.