(Al-Mujadila) 58 : 15
أَعَدَّ اللَّهُ لَهُمْ عَذَابًا شَدِيدًا ۖ إِنَّهُمْ سَاءَ مَا كَانُوا يَعْمَلُونَ
Allah has kept prepared for them severe punishment; indeed, whatever they are doing is so evil!
Verse 63: 2 also ends as, "indeed, whatever they are doing is so evil!" See explanation 3: 4; 32: 22; and 33: 60-62.