Ruqayyah, the daughter of the Holy Prophet(sa) and wife of Ḥaḍrat ‘Uthmān bin ‘Affān(ra), has already been mentioned above. Upon her demise, the Holy Prophet(sa) gave another daughter named Ummi Kulthūm(ra), who was older than Ḥaḍrat Fāṭimah(ra) but younger than Ruqayyah(ra), to Ḥaḍrat ‘Uthmān(ra) in marriage. It is for this very reason that Ḥaḍrat ‘Uthmān(ra) is known as Dhun-Nurain, i.e., the possessor of two lights. This was the second marriage of Ummi Kulthūm(ra), because in the beginning, her sister Ruqayyah(ra) and her were married to the two sons of Abū Lahab, the paternal uncle of the Holy Prophet(sa). However, before their Rukhsātanah could be held, this relation was severed on the basis of religious opposition. The Holy Prophet(sa) gave his daughter Ruqayyah to Ḥaḍrat ‘Uthmān(ra) in marriage first, and then after her demise, married off Ummi Kulthūm(ra) to him as well. It is unfortunate, however, that the progeny of both these daughters did not continue. Ummi Kulthūm(ra) did not have any children at all, and the son of Ruqayyah(ra), whose name was ‘Abdullāh, passed away at the age of six. The marriage of Ummi Kulthūm(ra) took place in Rabī‘ul-Awwal 2 A.H.1
1 Al-Iṣābah Fī Tamīziṣ-Ṣaḥābah, By Aḥmad bin ‘Alī bin Ḥajar Al-‘Asqalānī, Volume 8, p. 460, Ummu Kulthūmin bintu Sayyidul-Bashari Rasūlillāh(sa), Dārul-Kutubil-‘Ilmiyyah, Beirut, Lebanon (2005)
Usdul-Ghābah Fī Ma‘rifatiṣ-Ṣaḥābah, By ‘Izzuddīn Ibnul-Athīr Abul-Ḥasan ‘Alī bin Muḥammad, Volume 6, p. 399, Ummu Kulthūmin bintu Rasūlillāh(sa), Dārul-Fikr, Beirut, Lebanon (2003)