The Daughter of Fatima
Umm Kulthum was the third child of Ali and Fatima, after Hasan and Husayn (and before or alongside Zaynab al-Kubra, depending on source). Like her siblings, she was raised in the Prophet’s extended household. The Prophet is reported to have said of Fatima’s children: “These are my children and my children’s children.”
She was a child when the Prophet died (632 CE) and when her mother Fatima died shortly after.
The Marriage to Umar ibn Khattab
Sunni sources record that Umar ibn Khattab, the second Caliph, asked Ali for Umm Kulthum’s hand in marriage. Ali initially offered to wait until she was older; Umar persisted. She reportedly married Umar and bore him a son, Zayd.
In Shia tradition, this marriage is contested — some accounts present Umm Kulthum as reluctant and Ali as acting under political compulsion. Some Shia scholars dispute the marriage altogether. Others accept it as a political reality of the early Medinan period.
At Karbala and Its Aftermath
Umm Kulthum was present at Karbala (680 CE) and survived, along with her sister Zaynab al-Kubra, her nephew Ali ibn Husayn (Zayn al-Abidin), and other family members.
After the massacre, when the survivors were taken captive to Kufa, it was the women of the Ahl al-Bayt — particularly Zaynab — who delivered speeches before Ibn Ziyad and later before Yazid in Damascus, making Karbala a living memory rather than a buried event. Umm Kulthum is attributed speeches in some accounts of the Kufa entry, though most major orations in the tradition are assigned to Zaynab al-Kubra.
Her Hadith Transmission
Umm Kulthum narrated hadiths from her grandfather the Prophet, her mother Fatima, and her grandmother Khadijah through the chain of women of the household. Her narrations appear in collections relating to women’s practice and the Prophet’s personal conduct.
See also: Seerah Ali, Seerah Khadijah, Seerah Husayn, Seerah Hasan Ibn Ali, Asma Bint Abi Bakr, Seerah Aisha