Ezekiel 44:4-9 - Rules For Admission To The Temple
4 Then he brought me by way of the north gate to the front of the temple. As I watched, I noticed the glory of the Lord filling the Lord's temple, and I threw myself face down. 5 The Lord said to me: "Son of man, pay attention, watch closely and listen carefully to everything I tell you concerning all the statutes of the Lord's house and all its laws. Pay attention to the entrances to the temple with all the exits of the sanctuary.
6 Say to the rebellious, to the house of Israel, 'This is what the sovereign Lord says: Enough of all your abominable practices, O house of Israel! 7 When you bring foreigners, those uncircumcised in heart and in flesh, into my sanctuary, you desecrate it -- even my house -- when you offer my food, the fat and the blood. You have broken my covenant by all your abominable practices. 8 You have not kept charge of my holy things, but you have assigned foreigners to keep charge of my sanctuary for you.
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.