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 10:6

10:6 Then Ezra got up from in front of the temple of God and went to the room of Jehohanan son of Eliashib. While he stayed there, he did not eat food or drink water, for he was in mourning over the infidelity of the exiles.