in the first year of his reign, I, Daniel, understood from the sacred books, according to the word of the LORD to Jeremiah the prophet, that the desolation of Jerusalem would last seventy years.
KJV
In the first year of his reign I Daniel understood by books the number of the years, whereof the word of the LORD came to Jeremiah the prophet, that he would accomplish seventy years in the desolations of Jerusalem.
ASV
in the first year of his reign I, Daniel, understood by the books the number of the years whereof the word of Jehovah came to Jeremiah the prophet, for the accomplishing of the desolations of Jerusalem, even seventy years.