הלכה אויף ויקרא 3:1

The commandment of the procedure of the sacrifice of the peace-offerings: That the priests were commanded that they should execute the peace-offerings (sacrifice) according to the statute that is written in the passage, as it is stated (Leviticus 3:1), “If his sacrifice is a sacrifice of peace-offerings, etc.” And it states further in the completion of the process (Leviticus 7:11-12), “And this is the law of the sacrifice of the peace-offerings[...] If he offers it as a thanksgiving-offering.” And under four names are all matters of sacrifices included. And they are the burnt-offering; the sin-offering; the guilt-offering; and the peace-offerings. As any sacrifice offered by the community or the individual is always from one of them. I have already written twice that we should not write the roots for these processes (Sefer HaChinukh 138).