Nehemiah 13:1-3

1On that day the book of Moses was read aloud in the hearing of the people. They found written in it that no Ammonite or Moabite may ever enter the assembly of God,

2for they had not met the Israelites with food and water, but instead had hired Balaam to curse them. (Our God, however, turned the curse into blessing.)

3When they heard the law, they removed from Israel all who were of mixed ancestry.