Zubayr bin Bakkar (may Allah have mercy on him) said: Sayyidah Umm Kulthum bint Rasulullah (peace and blessings be upon him) was married to Utaybah bin Abi Lahab, whom the lion ate, and he left her. When Sayyidah Ruqayyah (may Allah be pleased with her) passed away while married to Uthman (may Allah be pleased with him), the Messenger of Allah (peace and blessings be upon him) married him to Sayyidah Umm Kulthum (may Allah be pleased with her), and she too passed away while married to him and bore him no children. The Prophet (peace and blessings be upon him) said to him: "If I had ten daughters, I would have married them all to you."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19264