Ezra 10:5-6

Then Ezra arose, and made the leaders of the priests, the Levites, and all Israel swear an oath that they would do according to this word. So they swore an oath. Then Ezra rose up from before the house of God, and went into the chamber of Jehohanan the son of Eliashib; and when he came there, he ate no bread and drank no water, for he mourned because of the guilt of those from the captivity.