Al-Matalib al-'Aliyah 4381 — The killing of Uthman bin Affan

It is narrated from Nafi' that on Yawm al-Dar (the day of the siege of the house of Sayyiduna Uthman al-Ghani (may Allah be pleased with him)), Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) put on armour twice and, presenting himself before him, submitted: "I remained in the company and companionship of the Messenger of Allah (peace and blessings be upon him), and I recognised and acknowledged for him (peace and blessings be upon him) the office of Prophethood and the right of authority and guardianship. Then I was in the company of Sayyiduna Abu Bakr (may Allah be pleased with him), and I acknowledged his right of authority. Then I had the companionship of Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), and I recognised his right of authority and his right as a father. And I recognise the same rights for you as well." At this Sayyiduna Uthman al-Ghani (may Allah be pleased with him) said: "O family of Umar! May Allah Almighty grant you the best reward. Stay in your house until my order reaches you."
In the chain of this hadith, al-Hasan bin Qutaybah is a da'if (weak) narrator; however, the coming out of Sayyiduna Ibn Umar (may Allah be pleased with them both) in defence of Sayyiduna Uthman (may Allah be pleased with him) is established by other authentic narrations.