Daniel 9:1-3

It was the first year of the reign of Darius the Mede, the son of Ahasuerus, who became king of the Babylonians. During the first year of his reign, I, Daniel, learned from reading the word of the LORD, as revealed to Jeremiah the prophet, that Jerusalem must lie desolate for seventy years. So I turned to the Lord God and pleaded with him in prayer and fasting. I also wore rough burlap and sprinkled myself with ashes.