Lamentations 1:10

10The adversary has spread out his hand

Over all her precious and desirable things;

For she has seen the [Gentile] nations enter her sanctuary (the Jerusalem temple)—

1:10 The Ammonites and Moabites, descendants of Lot and related to Israel, were forbidden to enter the congregation of the Lord, “even to their tenth generation,” because they refused to assist the sons of Israel when they were escaping from Egypt, and because they hired Balaam to curse Israel (Deut 23:3, 4). The Israelites never assembled any closer to the sanctuary of the temple than in the court outside its door. No Jew, not even David was authorized to enter the sanctuary proper except for certain Levites to whom such service was assigned. But now, Jeremiah says, the forbidden pagan nations enter the Holy of Holies to vandalize.The ones whom You commanded

That they should not enter into Your congregation [not even in the outer courts]. [Deut 23:3; Jer 51:51; Ezek 44:7, 9]