Anas ibne-Mãlik (Ra) narrates that Rasúlullãh (saw) said: You have indeed left behind in Madínah people who will have an equal share in reward in no matter whatsoever path you travel or whatever you spend and whatever valley you cross. The Sahabah asked: O Rasúlullãh! How can they be with us when they are in Madínah? He said: They intended to go out with you but were detained by a valid reason. (Abu Dãwúd)