Musnad Ahmad 1153:784

Aswad narrated to us, Sharik narrated to us, from Yahya ibn Sa'id, from al-Qasim ibn Muhammad, from 'Aishah, who said: The Prophet, peace and blessings of Allah be upon him, rose from his bed during a part of the night. I thought he was going to one of his wives, so I followed him until he stood at the graveyards. He said: "Peace be upon you, O abode of a believing people, and we shall, by the will of Allah, be joining you." Then he said: "O Allah, do not deprive us of their reward, and do not try us after them." She said: Then he turned and saw me, and said: "Woe to her, if she were able, she would not have done [what she did]."