Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 13:14-20

“That is, if the Roman war had not been soon finished, no flesh should be saved; that is, no Jew should have escaped; but for the elect’s sake, whom he hath chosen, that is, for the sake of the believing Jews, or who were hereafter to believe, He hath shortened the days, that is, the war was soon finished, for God foresaw that many Jews would believe after the destruction of the city; for which reason He would not suffer the whole race to be utterly destroyed.”