What was the greatest resource that the Prophet Muhammad (peace be upon him) had access to while seeking help for his task?
 Abu Huraira reported:                      The Messenger of Allah (may peace be upon him) said: I have been helped by terror (in the heart of the enemy) ; I have been given words which are concise but comprehensive in meaning; and while I was asleep I was brought the keys of the treasures of the earth which were placed in my hand.