Deuteronomy 23:3-8

3"No Ammonite or Moabite may enter the assembly of the Lord. Even to the tenth generation, none of them may enter the assembly of the Lord forever,

4because they did not meet you with bread and with water on the way, when you came out of Egypt, and because they hired against you Balaam the son of Beor from Pethor of Mesopotamia, to curse you.

5But the Lord your God would not listen to Balaam; instead the Lord your God turned the curse into a blessing for you, because the Lord your God loved you.

6You shall not seek their peace or their prosperity all your days forever.

7"You shall not abhor an Edomite, for he is your brother. You shall not abhor an Egyptian, because you were a sojourner in his land.

8Children born to them in the third generation may enter the assembly of the Lord.