سورة An-Najm ( The Star ) - الآية 32

Those who avoid the cardinal sins and lewdness, except that they approached it and refrained; indeed your Lord’s mercy is limitless; He knows you very well – since He has created you from clay, and when you were foetuses in your mothers’ wombs; therefore do not, on your own, claim yourselves to be clean; He well knows who are the pious.