Musannaf Ibn Abi Shayba 27:424

Yazid ibn Harun narrated to us, he said: Sufyan ibn Husayn informed us, from al-Hasan, he said: When Umar offered his daughter to Uthman, the Messenger of Allah (ﷺ) said: "Shall I not guide Uthman to one who is better than her, and guide her to one who is better for her than Uthman?" He said: So the Messenger of Allah (ﷺ) married her, and he married his daughter to Uthman.