Hoping that this companion would turn out to be the Prophet in person, Abu Bakr purchased two swift she-camels, which he stabled in the courtyard of his house, feeding them liberally, and keeping them in readiness to take to the road. Ayishah has said: "The Prophet, who never let a day go by, without coming to see my father, morning or evening, arrived suddenly at an unwonted hour. Abu Bakr guessed that some serious matter brought his son-in-law to our dwelling, and made room for him on the bench. The Prophet sat down and told him: 'Allah authoriseth me to depart from Makkah with my "qawm." My turn hath come to emigrate.'--'With me, O Prophet! in company with me?' supplicated Abu Bakr, plying him with questions. 'Yea, in thy company.'--'At this answer, tears of joy such as I had never seen before, welled up in my father's eyes, and he apprised Mohammad of his preparations for travel.'" The she-camels, in rare fettle, were handed over to Ibn-i-Arqas, an idolater, but in whom, nevertheless, Abu Bakr placed great confidence. Ibn-i-Arqas was to take them to graze, and three days later, lead them to a meeting-place appointed at the mouth of a cave in the Jabal Saur, about an hour and half's walk from Makkah, on the road leading to the sea. Ibn-i-Arqas would then serve as a guide as far as Yasrib. By a small door at the back of the house, the two fugitives went off secretly, stepping softly, and making their way to the Saur cave. The Prophet's naked feet were soon bleeding, cut by the sharp, loose stones of the mountain paths. Abu Bakr, in despair at seeing the blood of God's Chosen One flowing, carried him on his back the rest of the way, and put him down in front of the entrance to the grot in which he entered first. He explored every hole and corner to make sure that it did not serve as a refuge for wild beasts or reptiles. He picked up all the stones, which he piled in his cloak, and threw them down the side of the mountain. Then, with torn fragments of his apparel, he stopped up any holes which might have been places of concealment for scorpions or other venomous insects. Then only did he admit Mohammad who fell asleep, his head resting on his companion's thigh. But under the sand carpeting the cave, was hidden a viper which had thus escaped Abu Bakr's vigilant, searching glances. By an involuntary movement, the devoted disciple stamped on the reptile which, furious, turned with a hiss, and drove its dart into Abu Bakr's heel. The pain was atrocious, but, fearing to awaken the Prophet whose head was pillowed on his companion's thigh, Abu Bakr made not the slightest movement, nor did he let a cry escape his lips. Shortly afterwards, the venom began its malignant course through his veins, and the intensity of the pain drew tears from his eyes. A few burning drops fell on Mohammad's cheek. Waking up with a start, the Prophet asked: 'What ails thee, O sincere friend?'--'I have been stung by a viper.'