Yazid bin Amr al-Ma'afiri said: I heard Abu Thawr al-Fahmi narrate that Sayyiduna Uthman bin Affan (may Allah be pleased with him) said: "I have stored up ten things with my Lord: I am the fourth of four in Islam; I have never burdened myself with affectation, nor have I wished for anything unlawful; and since I gave my pledge of allegiance to the Messenger of Allah (peace and blessings be upon him) I have never placed my right hand on my private parts. Since I became Muslim, no Friday has passed over me in which I did not free a slave, unless I had no slave, in which case I would free one afterwards. And I never committed fornication, neither in the Jahiliyyah nor in Islam."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 123