Daniel 9:2-3

9:2 in the first year of his reign I, Daniel, came to understand from the sacred books that, according to the word of the LORD disclosed to the prophet Jeremiah, the years for the fulfilling of the desolation of Jerusalem were seventy in number. 9:3 So I turned my attention to the Lord God to implore him by prayer and requests, with fasting, sackcloth, and ashes.