Yazid bin Babnus reported,

I went with a companion of mine to Ayesha and asked her permission to enter. She threw down a cushion for us and drew the curtain toward herself.My companion said, "Umm Muiminin, what do you say about 'irak'?"She said, "And what is 'irak'?" Then she struck my companion's shoulder and said, "Stop, you have harmed your brother." Then she said, "What is 'irak'? Menstruation? Say what Allah said, menstruation."Then she said, "The Messenger of Allah ﷺ used to draw close against me and take from my head, with a garment between him and me, while I was menstruating."Then she said, "Whenever the Messenger of Allah ﷺ passed my door, he would usually toss out some word by which Allah would bring benefit. But one day he passed and said nothing, and then he passed again and said nothing, two or three times. So I said, 'Girl, set a cushion out for me by the door.' I bound my head with a cloth, and when he passed by me he said, 'Ayesha, what is the matter with you?'I said, 'My head is aching.'He said, 'As for me, oh my head!' Then he went away, and it was only a short while before he was brought back carried in a cloak. He came in to me and sent word to his wives, saying, 'I have fallen ill, and I cannot make my rounds among you. Give me leave to stay with Ayesha.'So I would help him with his wudu, and I had never helped anyone with wudu before him. One day, while his head was resting on my shoulder, his head inclined toward mine, and I thought he wanted something from my head. Then a cool drop of moisture came from his mouth and fell on the hollow of my throat, and my skin shivered at it. I thought he had fainted, so I covered him with a garment.Then Umar and Mughira bin Shuba came and asked permission to enter, and I let them in and drew the curtain toward myself. Umar looked at him and said, 'Oh, this swoon! How severe is the Messenger of Allah's swoon ﷺ!' Then the two of them rose, and when they drew near the door Mughira said, 'Umar, the Messenger of Allah ﷺ has died.'Umar said, 'You lie. You are only a man whom turmoil has thrown into confusion. The Messenger of Allah ﷺ will not die until Allah has destroyed the hypocrites.'Then Abu Bakr came, and I lifted the curtain. He looked at him and said, 'To Allah we belong and to Him we return. The Messenger of Allah ﷺ has died.' Then he came to him from the side of his head, bent his mouth down and kissed his forehead, and said, 'Oh, the Prophet!' Then he raised his head, bent his mouth down again and kissed his forehead, and said, 'Oh, the chosen one!' Then he raised his head, bent his mouth down and kissed him, and said, 'Oh, the dear friend! The Messenger of Allah ﷺ has died.'Then he went out to the masjid, where Umar was addressing the people and speaking, saying, 'The Messenger of Allah ﷺ will not die until Allah has destroyed the hypocrites.'So Abu Bakr spoke. He praised Allah and extolled Him, then said, 'Allah says, "Indeed you will die, and indeed they will die" [Zumar 39:30],' and he finished the verse. Then he recited, "Muhammad is no more than a messenger, and messengers have passed away before him. So if he dies or is killed, will you turn back on your heels?" [Al Imran 3:144], and he finished the verse. Then he said, 'Whoever used to worship Allah , Allah is alive. And whoever used to worship Muhammad, Muhammad has died.'Umar said, 'Is that really in the Book of Allah? I never realized it was in the Book of Allah.'Then Umar said, 'People, this is Abu Bakr, and he is the elder of the Muslims, so pledge your allegiance to him.' And they pledged their allegiance to him."

عن يزيد بن بابنوس، قال

ذهبت أنا وصاحب لي إلى عائشة فاستأذنا عليها، فألقت لنا وسادة وجذبت إليها الحجاب، فقال صاحبي: يا أم المؤمنين، ما تقولين في العراك؟ قالت: وما العراك؟ و ضربت منكب صاحبي فقالت: مه آذيت أخاك، ثم قالت: ما العراك؟ المحيض؟ قولوا ما قال الله: المحيض. ثم قالت: كان رسول الله ﷺ يتوشحني، وينال من رأسي، وبيني وبينه ثوب، وأنا حائض، ثم قالت: كان رسول الله ﷺ و إذا مر ببابي مما يلقي الكلمة ينفع الله عز وجل بها، فمر ذات يوم فلم يقل شيئا، ثم مر أيضا فلم يقل شيئا- مرتين أو ثلاثا- قلت: يا جارية، ضعي لي وسادة على الباب، وعصبت رأسي، فمر بي، فقال: يا عائشة، ما شأنك؟ فقلت: أشتكي رأسي. فقال: أنا وارأساه فذهب، فلم يلبث إلا يسيرا حتى جيء به محمولا في كساء، فدخل علي وبعث إلى النساء، فقال: إني قد اشتكيت، وإني لا أستطيع أن أدور بينكن، فأذن لي فلأكن عند عائشة. فكنت أوضئه، ولم أكن أوضئ أحدا قبله فبينما رأسه ذات يوم على منكبي إذ مال رأسه نحو رأسي، فظننت أنه يريد من رأسي حاجة، فخرجت من فيه نطفة باردة، فوقعت على ثغرة، نحري فاقشعر لها جلدي، فظننت أنه غشي عليه، فسجيته ثوبا، فجاء عمر والمغيرة بن شعبة فاستأذنا، فأذنت لهما، وجذبت إلي الحجاب، فنظر عمر إليه، فقال: وا غشياه ما أشدغشي رسول الله ﷺ، ثم قاما، فلما دنوا من الباب، قال المغيرة: يا عمر مات رسول الله ﷺ قال: كذبت بل أنت رجل تحوسك فتنة، إن رسول الله ﷺ لا يموت حتى يفني الله عز وجل المنافقين. ثم جاء أبو بكرفرفعت الحجاب، فنظر إليه، فقال: إنا لله وإنا إليه راجعون مات رسول الله ﷺ، ثم أتاه من قبل رأسه، فحدر فاه وقبل جبهته، ثم قال: وانبياه ثم رفع رأسه، ثم حدر فاه وقبل جبهته ثم قال: واصفياه ثم رفع رأسه و حدر فاه وقبل، وقال: واخليلاه مات رسول الله ﷺ، فخرج إلى المسجد وعمر يخطب الناس ويتكلم، ويقول: إن رسول الله ﷺ لا يموت حتى يفني الله عز وجل المنافقين، فتكلم أبو بكر، فحمد الله وأثنى عليه، ثم قال: إن الله عز وجل يقول: {إنك ميت وإنهم ميتون} [الزمر: ٣٠] حتى فرغ من الآية {وما محمد إلا رسول قد خلت من قبله الرسل أفإين مات أو قتل انقلبتم على أعقبكم} [آل عمران: ١٤٤] حتى فرغ من الآية، فمن كان يعبد الله عز وجل فإن الله حي، ومن كان يعبد محمدا فإن محمدا قد مات. فقال عمر: أو إنها لفي كتاب الله؟ ما شعرت أنها في كتاب الله، ثم قال عمر: يا أيها الناس هذا أبو بكر وهو ذو شيبة المسلمين فبايعوه فبايعوه.