In that ye have brought into My sanctuary strangers.
The relation of the stranger to the service of the temple
What is reprobated is not of course allowing foreigners to present sacrifices to Jehovah, which they might do (Leviticus 17:10; Leviticus 17:12), but allowing them to officiate in the offering, and in general in the ministry of the sanctuary. This is regarded by the prophet as a profanation of the house, and an infraction of the covenant between Jehovah and Israel. It is the latter from the nature of the case. Israel was the people of the Lord, and His service must be performed by Israel. These heathen were uncircumcised both in flesh and heart; their service was purely mercenary, and without religious reality. (A. B. Davidson, D. D.)