Musnad Ahmad 1255:18

'Abd al-Razzaq narrated to us, he said: Ma'mar informed us, from al-Zuhri, from 'Ubayd Allah ibn 'Abd Allah, that Abu 'Amr ibn Hafs ibn al-Mughirah went out with 'Ali ibn Abi Talib to Yemen, and he sent to his wife, Fatimah bint Qays, the one remaining pronouncement of divorce. He ordered al-Harith ibn Hisham and 'Ayyash ibn Abi Rabi'ah to provide her with maintenance. They said to her: "By Allah, you have no maintenance unless you are pregnant." She came to the Prophet, peace and blessings of Allah be upon him, and mentioned to him what they had said. He said: "No, unless you are pregnant." She asked his permission to move, and he permitted her. She said: "Where do you see [I should go], O Messenger of Allah?" He said: "To Ibn Umm Maktum." He was blind, so she could take off her clothes in his presence and he would not see her. When her waiting period ('iddah) ended, the Prophet, peace and blessings of Allah be upon him, married her to Usamah ibn Zayd. Marwan sent Qabisah ibn Dhu'ayb to her to ask her about this hadith, and she narrated it to him. Marwan said: "We have not heard this hadith except from a woman. We will hold fast to the practice we found the people upon." When Marwan's statement reached Fatimah, she said: "Between me and you is the Qur'an. Allah, the Mighty and Majestic, says: 'Do not turn them out of their houses, nor should they leave, unless they commit a clear immorality' [al-Talaq: 1], until He reached: 'You do not know; perhaps Allah will bring about after that a matter' [al-Talaq: 1]." She said: "This is for one who has the right of revocation (raj'ah), so what matter could be brought about after the three [pronouncements of divorce]?"