Nehemiah 13:23-25

King James Version

²³ In those days also saw I Jews that had married wives of Ashdod, of Ammon, and of Moab:

²⁴ And their children spake half in the speech of Ashdod, and could not speak in the Jews' language, but according to the language of each people.

²⁵ And I contended with them, and cursed them, and smote certain of them, and plucked off their hair, and made them swear by God, saying, Ye shall not give your daughters unto their sons, nor take their daughters unto your sons, or for yourselves.