Matthew 24:21 NIV

Daniel 12:1 NIV
“At that time Michael, the great prince who protects your people, will arise. There will be a time of distress such as has not happened from the beginning of nations until then. But at that time your people—everyone whose name is found written in the book —will be delivered.

Joel 2:2 NIV
    a day of darkness and gloom, a day of clouds and blackness. Like dawn spreading across the mountains a large and mighty army comes, such as never was in ancient times nor ever will be in ages to come.