Ezekiel 44:9-11

44:9 This is what the sovereign Lord says: No foreigner, who is uncircumcised in heart and flesh among all the foreigners who are among the people of Israel, will enter into my sanctuary.

44:10 “‘But the Levites who went far from me, straying off from me after their idols when Israel went astray, will be responsible for their sin. 44:11 Yet they will be ministers in my sanctuary, having oversight at the gates of the temple, and serving the temple. They will slaughter the burnt offerings and the sacrifices for the people, and they will stand before them to minister to them.