R’ Shimon says: There are three types [of offerings], which [between them] require three procedures: two for each one, but not the third. They are: the individual’s shelamim-offerings, communal shelamim-offerings, and the asham-offering of the metzora. The individual’s shelamim-offerings require leaning while living and waving when slaughtered — but they do not require waving while living. Communal shelamim-offerings require waving while living and when slaughtered — but they do not require leaning. The asham-offering of the metzora requires leaning and waving while living — but it does not require waving when slaughtered.