Fatimah bint Muhammad (, ; 615 AD/5 BH – died 28 August 632 ), commonly known as Fatimah al-Zahra ( "Fāṭimah al-Zahrāʾ"), was the daughter of the Islamic prophet Muhammad and Khadijah and therefore part of Muhammad's household. According to Sunni Muslims, Fatimah was the youngest of their daughters; according to Shia Muslims, she was their only biological child who lived to adulthood. Her husband was Ali, the last of the Rightly Guided Caliphs and the first Shia Imam, and her children include Hasan and Husayn, the second and third Imams, respectively. She is respected and venerated by Muslims, as she was the child closest to her father and supported him in his difficulties, was the supporter and caretaker of her own husband and children, and was the only child of Muhammad to have male children live beyond childhood, whose descendants are spread throughout the Islamic world and are known as Sayyids.