Nehemiah 13:23-25

23In those days I also saw Jews who had married women from Ashdod, Ammon, and Moab. 24Half of their children spoke the language of Ashdod or of the other peoples, but could not speak the language of Judah. 25I rebuked them and called down curses on them. I beat some of these men and pulled out their hair.

Then I made them take an oath before God and said, “You must not give your daughters in marriage to their sons or take their daughters as wives for your sons or for yourselves!