Aaron having completed the offerings, before he came down from the stage surrounding the altar on which the priests used to stand to officiate (see Exodus 27:8), turned toward the people, and blessed them; probably using the form which became the established one for the priests Numbers 6:24-26, and which is still maintained in the synagogues.
Related Commentaries of Leviticus 9:22
Leviticus 9:22
22 And Aaron lifted up his hand toward the people, and blessed them, and came down from offering of the sin offering, and the burnt offering, and peace offerings.