Fact is that every word in the whole Bible is the words of Jesus. And many references tell us that there would come a time when God's prophets will know the time of the end, as they have in times past known the precise time of destruction. For example Noah, Abraham and Lot about Sodom, and Jonah about Nineveh.
Revelation 3:3 "If therefore thou shalt not watch I will come upon thee as a thief, and thou shalt not know what hour I will come upon thee." Implying that those who are watching will know the hour.