‏الذكر والدعاء والتوبة والاستغفار‏ : Hadeeth No:6589 Umm Darda' reported: My husband reported that he heard Allaah's Mes- senger (sallAllaahu alayhi wa sallam) as saying: He who supplicates for his brother behind his back (in his absence), the Angel commissioned (for carrying supplication to his Lord) says: Amen, and it is for you also....

‏الفضائل : Hadeeth No:5786 Abu Juhaifa reported: I saw Allaah's Messenger (sallAllaahu alayhi wa sallam) that he had white complexion and had some white hair, and Hasan b. 'Ali resembled him....