وَإِذْ تَأَذَّنَ رَبُّكَ لَيَبْعَثَنَّ عَلَيْهِمْ إِلَى يَوْمِ الْقِيَامَةِ مَن يَسُومُهُمْ سُوءَ الْعَذَابِ إِنَّ رَبَّكَ لَسَرِيعُ الْعِقَابِ وَإِنَّهُ لَغَفُورٌ رَّحِيمٌ
[7:167]
And when your Lord announced that He would certainly send against them to the day of resurrection those who would subject them to severe torment; most surely your Lord is quick to requite (evil) and most surely He is Forgiving, Merciful.
Behold! thy Lord did declare that He would send against them, to the Day of Judgment, those who would afflict them with grievous penalty. Thy Lord is quick in retribution, but He is also Oft-forgiving, Most Merciful.
And (remember) when thy Lord proclaimed that He would raise against them till the Day of Resurrection those who would lay on them a cruel torment. Lo! verily thy Lord is swift in prosecution and lo! verily He is Forgiving, Merciful.