49أَلَمْ تَرَ إِلَى ٱلَّذِينَ يُزَكُّونَ أَنفُسَهُم ۚ بَلِ ٱللَّهُ يُزَكِّى مَن يَشَآءُ وَلَا يُظْلَمُونَ فَتِيلًا
50ٱنظُرْ كَيْفَ يَفْتَرُونَ عَلَى ٱللَّهِ ٱلْكَذِبَ ۖ وَكَفَىٰ بِهِۦٓ إِثْمًا مُّبِينًا
[49-50] Have you also marked those, who speak very highly of their own purity? However, Allah alone purifies whomever He pleases (and if they are not being purified), no injustice is being done to them in the least. Just behold! they do not hesitate to invent lies about Allah, and this sin alone suffices to show that they are manifest sinners.
.
