Waabisah b. Ma’bad رضي الله عنه said: I came to the Messenger of Allah صلى الله عليه وسلم who said to me: “Come close O Waabisah,” so I drew closer to him until my knee was touching his knee. He said: “O Waabisah, shall I tell you what you have come to ask me about?” Waabisah said: “Tell me O Messenger of Allah صلى الله عليه وسلم.” He said: “You want to question me on the subject of virtue and sin?'” “Yes,” I replied, and he went on, “Question your heart. Virtue is that by which the soul enjoys repose and the heart tranquillity. Sin is what introduces trouble into the soul and tumult into man’s bosom, whatever fatwas people may give you.”