Muhammad ibn Hatim ibn Maymun narrated to me: Ibn Mahdi narrated to us, from Mu'awiyah ibn Salih, from 'Abd al-Rahman ibn Jubayr ibn Nufayr, from his father, from al-Nawwas ibn Sam'an al-Ansari, who said: I asked the Messenger of Allah, peace and blessings be upon him, about righteousness and sin. He said: "Righteousness is good character, and sin is what wavers in your chest and you dislike that people should become aware of it."