What did the Messenger of Allah (peace be upon him) observe in terms of Nafl and Witr prayer when he was on a ride?
 Salim b. 'Abdullah reported on the authority of his father that the Messenger of Allah (may peace be. upon him) used to observe Nafl (supererogatory) prayer on his ride no matter in what direction it turned its face, and he observed Witr too on it, but did not observe obligatory prayer on it.