Matthew
Matthew 24:21ESV·traditional attribution

For then there will be great tribulation, such as has not been from the beginning of the world until now, no, and never will be.

John Calvin Reformed @genevareformer

21 For there will then be great tribulation. Luke says also, that there will be days of vengeance, and of wrath on that people, that all things which are written may be fulfilled. For since the people, through obstinate malice, had then broken the covenant of God, it was proper that alarming changes should take place, by which the earth itself and the air would be shaken.

John Gill Reformed Baptist @doctorgill

For then shall be great tribulation,.... This is urged as a reason for their speedy flight; since the calamity that would come upon those who should remain in the city, what through the sword, famine, pestilence, murders, robberies, &c. would be such as was not since the beginning of the world, to this time, no, nor ever shall be.

Albert Barnes Presbyterian @notesbybarnes

Verse 21. There shall be great tribulation. The word tribulation means calamity, or suffering. has specified in what this tribulation should consist. "They shall fall by the edge of the sword, and shall be led away captive into all nations; and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles shall be fulfilled." That is, until the time allotted for...