Matthew 24:21 in the King James Version
For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
Context
20 Pray that your flight will not be in the winter nor on a Sabbath,
21 for then there will be great suffering, such as has not been from the beginning of the world until now, no, nor ever will be.
22 Unless those days had been shortened, no flesh would have been saved. But for the sake of the chosen ones, those days will be shortened.