Daniel 9:1-3 English Standard Version (ESV)
Daniel's Prayer for His People
9 In the first year of Darius the son of Ahasuerus, by descent a Mede, who was made king over the realm of the Chaldeans— 2 in the first year of his reign, I, Daniel, perceived in the books the number of years that, according to the word of the Lord to Jeremiah the prophet, must pass before the end of the desolations of Jerusalem, namely, seventy years.
3 Then I turned my face to the Lord God, seeking him by prayer and pleas for mercy with fasting and sackcloth and ashes.
Daniel 9:1-3 New International Version (NIV)
9 In the first year of Darius son of Xerxes[a] (a Mede by descent), who was made ruler over the Babylonian[b] kingdom— 2 in the first year of his reign, I, Daniel, understood from the Scriptures, according to the word of the Lord given to Jeremiah the prophet, that the desolation of Jerusalem would last seventy years. 3 So I turned to the Lord God and pleaded with him in prayer and petition, in fasting, and in sackcloth and ashes.