Musnad Ahmad 1153:570

Abu al-Yaman narrated to us, he said: Shu'ayb informed us, from al-Zuhri, he said: 'Urwah ibn al-Zubayr said: 'Aishah said: The Prophet, peace and blessings of Allah be upon him, used to say while he was healthy: "No prophet is ever taken until he sees his seat in Paradise, then he is given the choice." When he became ill and his time of passing approached, and his head was on 'Aishah's thigh, he fainted. When he regained consciousness, he fixed his gaze toward the ceiling of the house, then said: "O Allah, the Highest Companion." 'Aishah said: I said: It is the speech he used to tell us while he was healthy.