Rashi on Numbers 18:11/רש"י על במדבר י״ח:י״א

1תרומת מתנם [AND THIS IS THINE:] THE HEAVE OFFERING OF THEIR GIFTS (i.e. of offerings given of their free will) — that which is set apart from the thanksgiving offering (cf. Leviticus 7:34), and from the festival offerings and from the ram of the Nazarite (Numbers 6:17).

2לכל תנופת [AND THIS IS THINE: THE HEAVE OFFERING OF THEIR GIFT] AS REGARDS ALL THAT FORMS A WAVE OFFERING [OF THE CHILDREN OF ISRAEL] — That the above named offerings are intended is evident, for, you see, it is these that require waving (Sifrei Bamidbar 117:2).

3כל טהור EVERY ONE THAT IS CLEAN [IN THY HOUSE SHALL EAT IT] — but not those who are unclean. Another explanation is: The expression “every one [in the house] that is clean” is intended to include his (the priest’s) wife (cf. Sifrei Bamidbar 117:2).