John Gill Commentary Leviticus 10:13

"and ye shall eat it in a holy place, because it is thy portion, and thy sons` portion, of the offerings of Jehovah made by fire: for so I am commanded." — Leviticus 10:13 (ASV)

And you shall eat it in the holy place
Not in that which was properly so called, but in the court of the tabernacle; at the door of the tabernacle of the congregation, as Aben Ezra, in some apartment there; for it was not to be carried out of the sanctuary, and eaten in their own houses or tents, as others might, after mentioned:

because it [is] your due, and your sons' due, of the offerings of the
Lord made by fire ;
and not any others; neither his wife nor his daughters, nor any other related to him, or whom he might invite, as in other cases, might eat of it; this none but he and his sons might eat of, and nowhere else but in the sanctuary:

for so I am commanded ;
to make known and declare this as the will of God.