Deuteronomy 9:18

Then Moses entreated the favor of Yahweh his God and said, “O Yahweh, why does Your anger burn against Your people whom You have brought out of the land of Egypt with great power and with a strong hand?

“When I went up to the mountain to receive the tablets of stone, the tablets of the covenant which Yahweh had cut with you, then I remained on the mountain forty days and nights; I neither ate bread nor drank water.

“So I fell down before Yahweh the forty days and the forty nights, which I did because Yahweh had said He would destroy you.

“I, moreover, stayed on the mountain forty days and forty nights like the first time, and Yahweh listened to me that time also; Yahweh was not willing to destroy you.

So he arose and ate and drank, and went in the strength of that food forty days and forty nights to Horeb, the mountain of God.

Then Ezra arose from before the house of God and went into the chamber of Jehohanan the son of Eliashib. He went there, but he did not eat bread nor drink water, for he was mourning over the unfaithfulness of the exiles.