91 In the first year of Darius the son of Ahasuerus, of the seed of the Medes, which was made king over the realm of the Chaldeans;
91 In the first year of Darius the son of Ahasuerus, by descent a Mede, who was made king over the realm of the Chaldeans--
91 "Darius, son of Ahasuerus, born a Mede, became king over the land of Babylon.
91 In the first year of Darius the son of Ahasuerus, of the lineage of the Medes, who was made king over the realm of the Chaldeans--
91 It was the first year of the reign of Darius the Mede, the son of Ahasuerus, who became king of the Babylonians.
Matthew Henry's Commentary on Daniel 9:1
Commentary on Daniel 9:1-3
(Read Daniel 9:1-3)
Daniel learned from the books of the prophets, especially from Jeremiah, that the desolation of Jerusalem would continue seventy years, which were drawing to a close. God's promises are to encourage our prayers, not to make them needless; and when we see the performance of them approaching, we should more earnestly plead them with God.