Deuteronomy 9:18
And I fell down before the LORD, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which you sinned, in doing wickedly in the sight of the LORD, to provoke him to anger.
Torrey's Topical Textbook—AKJV

Nehemiah 9:1
Now in the twenty and fourth day of this month the children of Israel were assembled with fasting, and with sackcloths, and earth on them.
Torrey's Topical Textbook—AKJV