Nehemiah 13:1-3, 23-26

On that day they read aloud from the book of Moses in the hearing of the people; and there was found written in it that no Ammonite or Moabite should ever enter the assembly of God, because they did not meet the sons of Israel with bread and water, but hired Balaam against them to curse them. However, our God turned the curse into a blessing. So when they heard the law, they excluded all foreigners from Israel.

In those days I also saw that the Jews had married women from Ashdod, Ammon and Moab. As for their children, half spoke in the language of Ashdod, and none of them was able to speak the language of Judah, but the language of his own people. So I contended with them and cursed them and struck some of them and pulled out their hair, and made them swear by God, “You shall not give your daughters to their sons, nor take of their daughters for your sons or for yourselves. Did not Solomon king of Israel sin regarding these things? Yet among the many nations there was no king like him, and he was loved by his God, and God made him king over all Israel; nevertheless the foreign women caused even him to sin.