O Abu Dhar! Shall I not tell you of two qualities which are light on the back, and are very heavy on the Scale as compared to others?
Abu Dhar said: Yes verily, O Rasulallah!
He said: Adopt good manners and observe prolonged silence. I swear by Him Who has control on the life of Muhammad, none of the deeds performed by any of the creation is as virtuous as these two.