Daniel 10:3

10:3 I ate no choice food; no meat or wine came to my lips, nor did I anoint myself with oil until the end of those three weeks.

Daniel 9:2

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.