﴿ لَّوْلَا كِتَٰبٌۭ مِّنَ ٱللَّهِ سَبَقَ لَمَسَّكُمْ فِيمَآ أَخَذْتُمْ عَذَابٌ عَظِيمٌۭ ﴾

“Had it not been for a decree from God that had already gone forth, there would indeed have befallen you a tremendous chastisement on account of all [the captives] that you took.”

Please check ayah 8:69 for complete tafsir.