When Abu Bakr read the letter of Imam Ali (a.s.), he turned restless and was fearful and said, "What an astonishment ! Verily Ali has demonstrated against me with such audacity and boldness". Then he said, "O group of Emigrants and Ansar ! Did I not counsel with you regarding the matter of Fadak ? Did you not tell me that the Prophets do not leave behind anything as inheritance ? Did you not declare that it was necessary that (the income of) Fadak should be used to guard and mobilize the frontiers and for general well-being of the people ? Certainly I accepted your advice and approved. But now Ali bin Abi Talib opposes this view and threatens similar to the sparkling of lightening and roaring of thunder. Actually he opposes my Caliphate, I wish to resign in this matter but you do not agree to it. From the first day of opposition, I did not like to come face to face with Ali, and I fled and am escaping from skirmish and dispute with him".