Matthew 24:21-22

for the desolation will be so dreadful, the like was never seen since the beginning of the world, no, nor ever shall be again.

Mark 13:19

for the distress of that time will be such as never happen'd since the beginning of the world, which God created, to this present, nor ever shall be.

Acts 2:20

the sun shall be turned into darkness, and the moon into blood, before that great and illustrious day of the Lord shall come.

Romans 11:26

and then all Israel shall be saved: as it is written, "there shall come out of Sion the deliverer, and shall turn away Jacob from his impiety.

Revelation 6:17

for the great day of his wrath is come; and who shall be able to subsist?"

Treasury of Scripture Knowledge

Summary

Alas! for that day is great, so that none is like it: it is even the time of Jacob's trouble; but he shall be saved out of it.

Bible References

For

Acts 2:20
the sun shall be turned into darkness, and the moon into blood, before that great and illustrious day of the Lord shall come.
Revelation 6:17
for the great day of his wrath is come; and who shall be able to subsist?"

So

Matthew 24:21
for the desolation will be so dreadful, the like was never seen since the beginning of the world, no, nor ever shall be again.
Mark 13:19
for the distress of that time will be such as never happen'd since the beginning of the world, which God created, to this present, nor ever shall be.

But

Romans 11:26
and then all Israel shall be saved: as it is written, "there shall come out of Sion the deliverer, and shall turn away Jacob from his impiety.