Quran 83:14 from Surah Al-Mutaffifin on Divine Marvels.
كـَلَّاۖ بَلۡۜ رَانَ عَلَىٰ قُلُوبِهِم مَّا كَانُواْ يَكۡسِبُونَ
English translation: Nay! But (the) stain has covered [over] their hearts (for) what they were earning
Transliteration: kalla bal rana ala qulubihim ma kanu yaksibuna