It is narrated from Ubaidullah bin Abdullah bin Utbah bin Mas'ud, who says: I went to Umm al-Mu'mineen Sayyidah Aisha Siddiqa (may Allah be pleased with her) and asked: Will you describe to me the illness of the Messenger of Allah (peace and blessings be upon him)? She said: Yes, why not, the details are that the Messenger of Allah (peace and blessings be upon him) was severely ill. The Messenger of Allah (peace and blessings be upon him) asked: Have the people performed the prayer? We replied: No, O Messenger of Allah! They are waiting for you. The Messenger of Allah (peace and blessings be upon him) said: Place water for me in a vessel. We placed the water, and the Messenger of Allah (peace and blessings be upon him) performed ghusl (ritual bath), but when he tried to stand up, he fainted. Then, when he regained consciousness, he asked: Have the people performed the prayer? We replied: No, O Messenger of Allah! They are waiting for you. The Messenger of Allah (peace and blessings be upon him) said: Place water for me in a vessel. (The Messenger of Allah, peace and blessings be upon him, performed ghusl.) Afterwards, when he tried to stand up, he fainted again, while the people were gathered in the mosque for the Isha prayer and were waiting for the Messenger of Allah (peace and blessings be upon him). Finally, the Messenger of Allah (peace and blessings be upon him) sent a message to Sayyiduna Abu Bakr (may Allah be pleased with him) to lead the people in prayer. Abu Bakr (may Allah be pleased with him) was extremely soft-hearted; he said: Umar! You lead the people in prayer, but Umar said: You are more deserving of this. So, during those days, Sayyiduna Abu Bakr (may Allah be pleased with him) led the people in prayer. Then, when the Messenger of Allah (peace and blessings be upon him) felt better, he went to the mosque for the Zuhr prayer with the support of two men; one of them was Sayyiduna Abbas (may Allah be pleased with him). When Sayyiduna Abu Bakr (may Allah be pleased with him) sensed the arrival of the Messenger of Allah (peace and blessings be upon him), he began to step back, but the Messenger of Allah (peace and blessings be upon him) gestured for him not to step back. The Messenger of Allah (peace and blessings be upon him) told those two men, and they seated him beside Abu Bakr (may Allah be pleased with him). Sayyiduna Abu Bakr continued to stand and lead the prayer, and the Messenger of Allah (peace and blessings be upon him) prayed while sitting. I (Ubaidullah bin Abdullah) went to Sayyiduna Ibn Abbas (may Allah be pleased with him) and said to him: Shall I not narrate to you the incident that Sayyidah Aisha (may Allah be pleased with her) narrated to me? He said: Yes, narrate it. Then he did not deny any part of it, except that he asked: Did she mention the name of the other man who was with Sayyiduna Abbas (may Allah be pleased with him)? I said: No. He said: He was Sayyiduna Ali (may Allah be pleased with him).