Matthew 24:21-22
for there will be greater misery at that time than ever has been since the world began, or ever will be again.
Mark 13:19
for there will be such misery at that time as has never been since the beginning of God's creation, and never will be again.
Acts 2:20
The sun will turn to darkness, and the moon to blood, before the coming of the great and glorious day of the Lord.
Romans 11:26
and so in that way all Israel will be saved, just as the Scripture says: "From Zion the Deliverer will come; He will remove ungodliness from Jacob;
Revelation 6:17
because the great day of their anger has come, and who can stand it?"