Nehemiah 13:1-3, 23-26

On that day they read from the Book of Moses in the hearing of the people, and in it was found written that no Ammonite or Moabite should ever come into the assembly of God, because they had not met the children of Israel with bread and water, but hired Balaam against them to curse them. However, our God turned the curse into a blessing. So it was, when they had heard the Law, that they separated all the mixed multitude from Israel.

In those days I also saw Jews who had married women of Ashdod, Ammon, and Moab. And half of their children spoke the language of Ashdod, and could not speak the language of Judah, but spoke according to the language of one or the other people. So I contended with them and cursed them, struck some of them and pulled out their hair, and made them swear by God, saying, “You shall not give your daughters as wives to their sons, nor take their daughters for your sons or yourselves. Did not Solomon king of Israel sin by these things? Yet among many nations there was no king like him, who was beloved of his God; and God made him king over all Israel. Nevertheless pagan women caused even him to sin.