because at that time there will be great tribulation unlike anything that has happened since the beginning of the world until now, no, and it will never ever happen again. Bible see other translations

“great tribulation.” Jesus would have learned a lot about the Tribulation period from the Old Testament. For example, Isaiah 13:9-13; 24:1-23; 34:1-8; 63:1-6; Jeremiah. 30:6-7; Daniel 12:1; Joel 1:15; 2:1-11; 3:14-16; Amos 5:16-20; 8:8-14; Obadiah 1:15-16; Micah 5:10-15; Zephaniah 1:7-18; Zechariah 12:1-9; 14:1-6; and Malachi 4:1-3. It is a terrible time on earth in which most people will be killed.

Those who survive the Tribulation and Armageddon are divided by Jesus into two groups: the sheep and the goats, and the sheep will be allowed into Christ’s kingdom, while the goats will be thrown into the Lake of Fire (Matt. 25:31-46).

[For more on the terrible time during the Great Tribulation, see commentary on Isa. 13:9 and Dan. 12:1. For more on the Sheep and Goat Judgment and the chronology of the events in the end times, see commentary on Matthew 25:32.]

Commentary for: Matthew 24:21