Daniel 9:2

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.

Read Daniel 9:2 Using Other Translations

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.
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.
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.