| Clarke's Commentary on the Bible Take one young bullock - This consecration did not take place till after the erection of the tabernacle. See Leviticus 8:9-14.
Gill's Exposition of the Entire BibleAnd this is the thing that thou shalt do unto them,.... To Aaron and his sons: to "hallow" them; to sanctify them, set them apart, and consecrate them: to minister unto me in the priest's office; for which the Lord had appointed them, to which he had chose, called, and separated them: take one young bullock, and two rams without blemish; a young bullock was an heifer of three years old, according to Kimchi (t), and such an one was used in sacrifice in former times, see Genesis 15:9 though Maimonides (u) says it was one of two years, and so Abendana (w), whose words are,"a bullock is a son of two years, and a ram is after he has entered into the second year thirty one days;''and so Ben Gersom; the bullock was an emblem of the strength, laboriousness, and patience of Christ, and both of them being without blemish, were typical of his purity and perfection in his nature and life, and especially in his sacrifice. (t) Comment. in Psal. lxix. 32. (u) Hilchot Zebachim, c. 1. sect. 14. (w) Not. in Miclol Yophi in loc.
Keil and Delitzsch Biblical Commentary on the Old TestamentConsecration of Aaron and his Sons through the anointing of their persons and the offering of sacrifices, the directions for which form the subject of vv. 1-35. This can only be fully understood in connection with the sacrificial law contained in Leviticus 1-7. It will be more advisable therefore to defer the examination of this ceremony till we come to Leviticus 8, where the consecration itself is described. The same may also be said of the expiation and anointing of the altar, which are commanded in Exodus 29:36 and Exodus 29:37, and carried out in Leviticus 8:11.
Geneva Study BibleAnd this is the thing that thou shalt do unto them to hallow them, to minister unto me in the priest's office: Take one young bullock, and two rams without blemish,
Scofield Reference Notes[1] do unto them to hallow them The priest type of consecration. (Cf. the temple type, 1Ki 8:1-11 2Chr 5:4,14. The order in Leviticus 8:1-9:24 differs from the order here. In Leviticus the filling the hands precedes the sprinkling. Margin bullock, rams See Scofield Note: "Lev 1:3".
Jamieson-Fausset-Brown Bible CommentaryCHAPTER 29 Ex 29:1-35. Consecrating the Priests and the Altar. 1. hallow them, to minister unto me in the priest's office-The act of inaugurating the priests was accompanied by ceremonial solemnities well calculated not only to lead the people to entertain exalted views of the office, but to impress those functionaries themselves with a profound sense of its magnitude and importance. In short, they were taught to know that the service was for them as well as for the people; and every time they engaged in a new performance of their duties, they were reminded of their personal interest in the worship, by being obliged to offer for themselves, before they were qualified to offer as the representatives of the people. this is the thing that thou shalt do-Steps are taken at the beginning of a society, which would not be repeated when the social machine was in full motion; and Moses, at the opening of the tabernacle, was employed to discharge functions which in later periods would have been regarded as sacrilege and punished with instant death. But he acted under the special directions of God.
Matthew Henry's Concise Commentary29:1-37 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, Heb 2:10. All believers are spiritual priests, to offer spiritual sacrifices, | 
