Ezra 10:4

Shecaniah the son of Jehiel, one of the sons of Elam, answered Ezra, "We have trespassed against our God, and have married foreign women of the peoples of the land. Yet now there is hope for Israel concerning this thing.

Now therefore let us make a covenant with our God to put away all the wives, and such as are born of them, according to the counsel of my lord, and of those who tremble at the commandment of our God. Let it be done according to the law.

Then Ezra arose, and made the chiefs of the priests, the Levites, and all Israel, to swear that they would do according to this word. So they swore.

Then Ezra rose up from before the house of God, and went into the room of Jehohanan the son of Eliashib: and [when] he came there, he ate no bread, nor drank water; for he mourned because of the trespass of them of the captivity.