Daniel 8:13: "Then I heard one saint speaking, and another saint said unto that certain saint which spake, How long shall be the vision concerning the daily sacrifice, and the transgression of desolation, to give both the sanctuary and the host to be trodden under foot?"
Daniel 8:14: "And he" [The saint/angel which spake] "said unto me, Unto two thousand and three hundred days;" [Approximately 6.4 years] "then shall the sanctuary be cleansed."