... They proceeded to the house of Abu Bakr, and asked his daughter Asma where her father had gone to? She said that she did not know. Abu Jahl, who, to use the lady's own words, was a blackguard and a ruffian, gave her such a box on her ear that she lost her ear-ring.  Abu Bakr had made the necessary preparations for the journey.  He had bought two swift camels for eight hundred dirhams, and he kept five or six hundred dirhams in cash in his house, to be provided with money; and it appears that he had also previously hired a guide.  Asma his daughter, when Mohammad came into his house, roasted a lamb under hot ashes, and tied it up in a round piece of leather, which the Arabs spread on the ground to dine upon instead of a table, for the road. (The Life of Mohammad, Sprenger, 1851)