Jamieson, Fausset and Brown on Leviticus 22:10-13

Le 22:10-16. Who of the Priests' House May Eat of Them.

10-13. There shall no stranger eat the holy thing--The portion of the sacrifices assigned for the support of the officiating priests was restricted to the exclusive use of his own family. A temporary guest or a hired servant was not at liberty to eat of them; but an exception was made in favor of a bought or homeborn slave, because such was a stated member of his household. On the same principle, his own daughter, who married a husband not a priest, could not eat of them. However, if a widow and childless, she was reinstated in the privileges of her father's house as before her marriage. But if she had become a mother, as her children had no right to the privileges of the priesthood, she was under a necessity of finding support for them elsewhere than under her father's roof.