John Gills Exposition of the Bible Commentary - Leviticus 22:15
And they shall not profane the holy things of the children of Israel, which they offer unto the Lord. By causing or suffering strangers to eat of them; so Jarchi, referring the words to the priests, who should be careful that strangers ate not of sacred things; or by the strangers themselves eating them, whereby they were profaned and used as common things. read more
Matthew Henry's Complete Commentary - Leviticus 22:10-16
The holy things were to be eaten by the priests and their families. Now, I. Here is a law that no stranger should eat of them, that is, no person whatsoever but the priests only, and those that pertained to them, Lev. 22:10. The priests are charged with this care, not to profane the holy things by permitting the strangers to eat of them (Lev. 22:15) or suffer them to bear the iniquity of trespass (Lev. 22:16); that is, suffer them to bring guilt upon themselves, by meddling with that which... read more