[Sahih Muslim : Book 32 Kitab Al-Adab, Number 6195]
Nawwas b. Sim'an al-Ansiri (Radi Allah Anhu) reported: I asked Allah's Messenger (sal-allahu- alleihi-wasallam ) about virtue and vice. He (sal-allahu- alleihi-wasallam ) said: Virtue is a kind disposition and vice is what rankles in your heart and that you disapprove that people should come to know of it.
[Sahih Muslim : Book 32 Kitab Al-Adab, Number 6196]
Nawwis b. Sim'in (Radi Allah Anhu) reported: I stayed with Allah's Messenger (sal-allahu- alleihi-wasallam ) for one year. What obstructed me to migrate was (nothing) but (persistent) inquiries from him (about Islam). (It was a common observation) that when anyone of us migrated (to Medina) he ceased to ask (too many questions) from Allah's Messenger (may peace be upon him). So I asked him about virtue and vice. Thereupon Allah's Messenger (sal-allahu- alleihi-wasallam ) said: Virtue is a kind disposition and vice is what rankles in your mind and that you disapprove of its being known to the people.