Amr bin Maymun reported,

When he passed away, meaning Umar bin Khattab, we carried him out and proceeded on foot. Abdullah bin Umar gave the greeting of peace and said, "Umar bin Khattab seeks permission to enter."She replied, "Bring him in."He was brought in and laid to rest there alongside his two companions. Once the burial was complete, this group of men gathered together.Abdul-Rahman said, "Entrust your affair to three among you."Zubayr said, "I have entrusted my affair to Ali."Talha said, "I have entrusted my affair to Uthman."Saad said, "I have entrusted my affair to Abdul-Rahman bin Awf."Then Abdul-Rahman said, "Which of you two will withdraw from this matter, so that we may assign it to the other? By Allah and Islam, he must consider who is the most deserving among them."The two elders fell silent.Abdul-Rahman said, "Will you then entrust the matter to me? By Allah, I will not fall short of choosing the best among you."They said, "Yes."He took the hand of one of them and said, "You have kinship with the Messenger of Allah ﷺ and precedence in Islam, as you well know. Allah is your witness, if I appoint you, you must rule justly, and if I appoint Uthman, you must listen and obey."Then he took the other aside privately and said the same to him. Once he had taken the pledge from them, he said, "Raise your hand, Uthman," and he pledged allegiance to him. Ali then pledged allegiance to him, and the people of the house entered and pledged allegiance to him as well.

عن عمرو بن ميمون قال

فلما قبض- يعني عمر بن الخطاب- خرجنا به فانطلقنا نمشي، فسلم عبد الله بن عمر قال: يستأذن عمر بن الخطاب قالت: أدخلوه، فأدخل، فوضع هنالك مع صاحبيه، فلما فرغ من دفنه اجتمع هؤلاء الرهط فقال عبد الرحمن: اجعلوا أمركم إلى ثلاثة منكم، فقال الزبير: قد جعلت أمري إلى علي، فقال طلحة: قد جعلت أمري إلى عثمان، وقال سعد: قد جعلت أمري إلى عبد الرحمن بن عوف فقال عبد الرحمن: أيكما تبرأ من هذا الأمر، فنجعله إليه، والله عليه والإسلام، لينظرن أفضلهم في نفسه، فأسكت الشيخان، فقال عبد الرحمن: أفتجعلونه إلي، والله علي أن لا آل عن أفضلكم؟ قالا: نعم فأخذ بيد أحدهما، فقال: لك قرابة من رسول الله ﷺ، والقدم في الإسلام ما قد علمت، فالله عليك لئن أمرتك لتعدلن، ولئن أمرت عثمان، لتسمعن ولتطيعن، ثم خلا بالآخر، فقال له: مثل ذلك، فلما أخذ الميثاق قال: ارفع يدك يا عثمان، فبايعه فبايع له علي، وولج أهل الدار فبايعوه.