John Gills Exposition of the Bible Commentary - Leviticus 9:21
And the breasts and the right shoulder ,.... The breasts of the bullock and the ram, and the right shoulders of them both: Aaron waved for a wave offering before the Lord ; which was given to him as his part of the peace offerings, after they had been thus waved before the Lord; whereby an acknowledgment was made that he was Lord of all, and had a right to all they had; in token of which these parts were given to his priests towards their maintenance: as Moses commanded ; see Exodus... read more
Matthew Henry's Complete Commentary - Leviticus 9:8-22
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... read more