Demise of Hazrat Umm Kulthum (ra)

Hazrat Umm Kulthum (ra) and Hazrat Uthman’s (ra) companionship remained until 9 AH, after which she became unwell and passed away. The Holy Prophet (sa) led her funeral prayer and then sat beside her grave. Hazrat Anas (ra) relates that he saw the Holy Prophet (sa) seated beside the grave of Hazrat Umm Kulthum (ra) whilst tears were flowing from his eyes.

(Ali Muhammad al-Salabi, Sirat Amir al-Momineen Uthman (ra) bin Affan Shakhsiyyatuh wa Asruh, Ch. 1 [Beirut, Lebanon: Dar al-Ma‘rifah, 2006] p. 42)