Musannaf Ibn Abi Shayba 10:1312

Abu Bakr narrated to us, he said: Sahl ibn Yusuf narrated to us, from Humayd, from Bakr ibn Khalid ibn Abd Allah, that he asked al-Hasan about a man who divorced his wife three times during his illness, and he died while her waiting period had ended. He said: She inherits.