John Gill Commentary Leviticus 7:32

"And the right thigh shall ye give unto the priest for a heave-offering out of the sacrifices of your peace-offerings." — Leviticus 7:32 (ASV)

And the right shoulder shall you give to the priest [for]
an heave offering
Whether of an ox or a cow, a lamb or a goat:

of the sacrifices of your peace offerings ; which were of either of these creatures; the Targum of Jonathan paraphrases it, ``the right arm from the shoulder to the elbow.''

The breast being the seat of wisdom, and the shoulder of strength, some think denote Christ as the wisdom and power of God to his people, his priests, who have all their knowledge and strength from him, and who bears them on his heart and on his shoulder.