What is the prayer that the Prophet Muhammad (saw) prayed for his Ummah and wish to defer on the Day of Resurrection?
 Abu Huraira reported:                      The Messenger of Allah (may peace be upon him) said: There was for every apostle a prayer with which he prayed for his Ummah and it was granted to him; but I wish, if Allah so wills, to defer my prayer for the intercession of my Ummah on the Day of Resurrection.