Abdullaah ibn Mas’ood (a Companion) narrated that a man came to the Prophet of Allah, sallallaahu ‘alayhi wa sallam, and said: “How can I know if I am doing good or evil?” The Prophet of Allah, sallallaahu ‘alayhi wa sallam, said: “If you hear your neighbors saying you have done well, then you have done well. If you hear them say you have acted badly, then you have acted badly.”