Charles Ellicott Commentary Numbers 18:11

"And this is thine: the heave-offering of their gift, even all the wave-offerings of the children of Israel; I have given them unto thee, and to thy sons and to thy daughters with thee, as a portion for ever; every one that is clean in thy house shall eat thereof." — Numbers 18:11 (ASV)

The heave offering of their gift, with all the wave offerings ... — See Leviticus 7:34.

Every one that is clean in thy house shall eat of it.— See Leviticus 22:10-13.