Nehemiah 13:23-25

New Catholic Bible

²³ Mixed Marriages. In those days also I saw Jews who had married women from Ashdod, Ammon, and Moab. ²⁴ Half of their children spoke the language of Ashdod or the language of one of the other peoples, but none of them could speak the language of the Jews.

²⁵ Thereupon I reprimanded them and I cursed them, beat some of them and pulled out their hair, and I made them swear in the name of God: “You are not to give your daughters in marriage to their sons or to take away any of their daughters in marriage for your sons or for yourselves.