Surah Al-Mujadila, Verse 15

أَعَدَّ ٱللَّهُ لَهُمۡ عَذَابٗا شَدِيدًاۖ إِنَّهُمۡ سَآءَ مَا كَانُواْ يَعۡمَلُونَ١٥

aʿadda l-lahu lahum ʿadhāban shadīdan innahum sāa mā kānū yaʿmalūna

Allāh has prepared for them a severe punishment. Indeed, it was evil that they were doing.