Nehemiah 13:23-29

In those days also saw I the Jews that had married women of Ashdod, of Ammon, and of Moab: 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. 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 for your sons, or for yourselves. Did not Solomon king of Israel sin by these things? yet among many nations was there no king like him, and he was beloved of his God, and God made him king over all Israel: nevertheless even him did foreign women cause to sin. Shall we then hearken unto you to do all this great evil, to trespass against our God in marrying foreign women? And one of the sons of Joiada, the son of Eliashib the high priest, was son-in-law to Sanballat the Horonite: therefore I chased him from me. Remember them, O my God, because they have defiled the priesthood, and the covenant of the priesthood, and of the Levites.