These being the first offerings that ever were offered by the levitical priesthood, according to the newly-enacted law of sacrifices, the manner of offering them is particularly related, that it might appear how exactly they agreed with the institution. 1. Aaron with his own hands slew the offering (Lev 9:8), and did the work of the inferior priests; for, great as he was, he must not think any service below him which he could do for the honour of God: and, as Moses had shown him how to do this work decently and dexterously, so he showed his sons, that they might do likewise; for this is the best way of teaching, and thus parents should instruct their children by example. Therefore as Moses before, so Aaron now offered some of each of the several sorts of sacrifices that were appointed, whose rites differed, that they might be thoroughly furnished for every good work. 2. He offered these besides the burnt-sacrifice of the morning, which was every day offered first, Lev 9:17. Note, Our accustomed devotions morning and evening, alone and in our families, must not be omitted upon any pretence whatsoever, no, not when extraordinary services are to be performed; whatever is added, these must not be diminished. 3. It is not clear whether, when it is said that he burnt such and such parts of the sacrifices upon the altar (Lev 9:10-20), the meaning is that he burnt them immediately with ordinary fire, as formerly, or that he laid them upon the altar ready to be burnt with the fire from heaven which they expected (Lev 9:24), or whether, as bishop Patrick thinks, he burnt the offerings for himself with ordinary fire, but when they were burnt out he laid the people's sacrifices upon the altar, which were kindled and consumed by the fire of the Lord. I would rather conjecture, because it is said of all these sacrifices that he burnt them (except the burnt-offering for the people, of which it is said that he offered it according to the manner, Lev 9:16, which seems to be equivalent), that he did not kindle the fire to burn them, but that then the fire from the Lord fastened upon them, put out the fire that he had kindled (as we know a greater fire puts out a less), and suddenly consumed the remainder, which the fire he had kindled would have consumed slowly. 4. When Aaron had done all that on his part was to be done about the sacrifices he lifted up his hand towards the people, and blessed them, Lev 9:22. This was one part of the priest's work, in which he was a type of Christ, who came into the world to bless us, and when he was parted from his disciples, at his ascension, lifted up his hands and blessed them, and in them his whole church, of which they were the elders and representatives, as the great high priest of our profession. Aaron lifted up his hands in blessing them, to intimate whence he desired and expected the blessing to come, even from heaven, which is God's throne. Aaron could but crave a blessing, it is God's prerogative to command it. Aaron, when he had blessed, came down; Christ, when he blessed, went up.

And Aaron lifted up his hand toward the people, and blessed them - On lifting up the hands in prayer, see Exo 9:29. The form of the blessing we have in Num 6:23, etc.: "The Lord bless thee and keep thee! The Lord make his face shine upon thee, and be gracious unto thee! The Lord lift up his countenance upon thee, and give thee peace!" See the notes on these passages Exo 9:29 (note), and Num 6:23 (note).
And came down from offering of the sin-offering, etc. - A sin-offering, a burnt-offering, a meat-offering, and peace-offerings, were made to God that his glory might appear to the whole congregation. This was the end of all sacrifice and religious service; not to confer any obligation on God, but to make an atonement for sin, and to engage him to dwell among and influence his worshippers.

And Moses and Aaron went into the tabernacle of the congregation,.... They went out of the court where the altar of burnt offering stood, and where Aaron had been offering the sacrifices; and they went into the holy place, where stood the altar of incense, the shewbread table, and the candlestick; and it is probable Moses went in with Aaron thither, to show him how to offer the incense, to order the shewbread on the table, and to light and trim the lamps of the candlestick; and so Jarchi observes, that he went in to teach him concerning the business of the incense; but it may be, it was also to pray for the people, as the Targum, and for the Lord's appearance to them, as was promised and expected, and that fire might descend on the sacrifices as a token of acceptance of them, as Aben Ezra notes:

and came out, and blessed the people; Aaron had blessed them before, but now both Moses and Aaron blessed them, atonement being made by the sacrifice of Christ, and law and justice thereby fully satisfied; Christ and the law agree together in the blessing of the Lord's people; way was hereby made for the communication of blessings to them, consistent with the law of God, and his holiness and justice, Gal 3:10,

and the glory of the Lord appeared unto all the people: some visible signs of his glory, some very great splendour or lustre, or breaking forth of his glory; or Christ, the glory of the Father, appeared in an human form, as a pledge of his future incarnation, when all the above sacrifices, which were types of him, would have their accomplishment; and this being immediately upon the offering of them, may signify that the glory of God greatly appears in the sacrifice and satisfaction of Christ, and in the redemption and salvation of his people in that way, Psa 21:4 and the glorious and gracious presence of God is enjoyed by his people, in consequence of the propitiatory sacrifice of Christ, which was signified by the mercy seat, from whence the Lord communed; and it is through Christ, his blood and sacrifice, saints have access to God, and fellowship with him, Eph 2:18.

Aaron lifted up his hand . . . and blessed them--The pronouncing of a benediction on the people assembled in the court was a necessary part of the high priest's duty, and the formula in which it was to be given is described (Num 6:23-27).

came down from offering--The altar was elevated above the level of the floor, and the ascent was by a gentle slope (Exo 20:26).