Leviticus 7:29,30

Shall bring Not by another, but by himself, that is, those parts of the peace-offering which are in a special manner offered to God. His oblation unto the Lord That is, to the tabernacle, where the Lord was present in a special manner His own hands After the beast was killed, and the parts of it divided, the priest was to put the parts mentioned into the hands of the offerer. Offerings made by fire So called, not strictly, as burnt-offerings are, because some parts of these were left for the priests, but more largely, because even these peace-offerings were in part, though not wholly, burned. Waved To and fro, by his hands, which were supported and directed by the hands of the priest.