النساۤء — An-Nisa' Ayat 49
اَلَمْ تَرَ اِلَى الَّذِيْنَ يُزَكُّوْنَ اَنْفُسَهُمْ ۗ بَلِ اللّٰهُ يُزَكِّيْ مَنْ يَّشَاۤءُ وَلَا يُظْلَمُوْنَ فَتِيْلًا
Alam tara ilal-lażīna yuzakkūna anfusahum, balillāhu yuzakkī may yasyā'u wa lā yuẓlamūna fatīlā(n).
"Have you not seen those who claim themselves to be pure? Rather, Allah purifies whom He wills, and injustice is not done to them, [even] as much as a thread [inside a date seed]."