Marinate al-Sahabah by Ibn Manda, p. 932
“et himself, and he was one of the few people at that time who could write down the Quran. Prophet Muhammad married his daughter, Hazrat Ruqayyah, to Usman, and after Hazrat Ruqayyah passed away, Prophet married his other daughter, Hazrat Umm Kulthum, to Hazrat Usman. Abu Huraira narrates that the Prophet stood at the door of Masjid Al-Nabawi and said that, "O Usman, Jibreel has told me that Allah wants”