Ezra 9:12

9:12 Therefore do not give your daughters in marriage to their sons, and do not take their daughters in marriage for your sons. Do not ever seek their peace or welfare, so that you may be strong and may eat the good of the land and may leave it as an inheritance for your children forever.’

Ezra 10:3

10:3 Therefore let us enact a covenant with our God to send away all these women and their offspring, in keeping with your counsel, my lord, and that of those who respect the commandments of our God. And let it be done according to the law.