‏البر والصلة والآداب‏ : Hadeeth No:6258 Nu'man b. Bashir reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The similitude of believers in regard to mutual love, affection, fellow-feeling is that of one body; when any limb of it aches, the whole body aches, because of sleeplessness and fever....

‏الإيمان : Hadeeth No:72 It is arrested on the authority of Anas b. Malik that the Prophet (may peace and blessings be upon him) observed: one amongst you believes (truly) till one likes for his brother or for his neighbour that which he loves for himself....