A stranger's hand — From proselytes: even from those, such should not be accepted, much less from the Israelites. The bread of your God — That is, the sacrifices.
Related Commentaries of Leviticus 22:25
Leviticus 22:25
25 Neither from a stranger's hand shall ye offer the bread of your God of any of these; because their corruption is in them, and blemishes be in them: they shall not be accepted for you.