أَلَمْ تَرَ إِلَى ٱلَّذِينَ يُزَكُّونَ أَنفُسَهُم ۚ بَلِ ٱللَّهُ يُزَكِّى مَن يَشَآءُ وَلَا يُظْلَمُونَ فَتِيلًا
Alam tara ilal lazeena yuzakkoona anfusahum; balil laahu yuzakkee mai yashaaa'u wa laa yuzlamoona fateelaa
Have you not seen those who claim purity for themselves? Rather, God purifies whom he wills, and they will not be wronged by so much as the thread of a date stone.