Isaiah 13:9

(Verse 9.) Behold, the day of the Lord comes, cruel and full of indignation, wrath and fury, to make the earth a desolation, and to destroy its sinners. He calls it a cruel day, not because of its own merit, but because of the people. For he is not cruel who kills the cruel, but because he appears cruel to those who suffer. For even the thief hanging on the gallows considers the judge cruel. At the same time, the solitude and desolation of the land of Babylon are announced, and the cause of the desolation is explained, because all these things happen because of its inhabitants.

Concerning that day, hear the prophets, saying, "The day of the Lord is incurable, full of anger and wrath." For there will be none to stand by, none to rescue, nowhere the face of Christ, so mild and calm. But as those who work in the mines are delivered over to certain cruel men, and see none of their friends, but those only that are set over them; so will it be then also: or rather not so, but even far more grievous. For here it is possible to go unto the king, and entreat, and free the condemned person: but there, no longer; for He permits it not, but they continue in the scorching torment, and in so great anguish, as it is not possible for words to tell.

(Verse 9) Behold, the cruel day of the Lord is coming, full of indignation, wrath, and fury, to make the earth a desolation and to crush sinners out of it. For the phrase 'the earth' the Seventy interpreted it as 'the inhabited world', that is, the globe. And for 'cruel' they translated it as 'incurable'. For when the day of judgment or death comes, that will be fulfilled which is read in the sixth psalm: 'For in death, who will give you thanks?' (Ps. VI, 6). For that time is not a time of repentance, but of punishment. And in another place it is said: How great is the multitude of your sweetness, Lord, which you have hidden for those who fear you! Therefore, much of God's mercy is hidden from those who are still in fear and do not have perfect love of God, so that when they hear of the cruel day of the Lord, and of the incurable and full of anger and fury, they may cease from sinning. The world or the earth will also be turned into a desert, and sinners will be crushed by it, which was previously burdened by the weight of sins, so that after wickedness is destroyed and lost, only justice may dwell and reign in the earth.