Sahih al-Bukhari 5714

'Ubaydullah ibn 'Utba related that 'A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, 'When the Messenger of Allah, may Allah bless him and grant him peace, was very ill and his illness was grave, he asked permission of his wives to remain ill in my house and he received permission. He went out, supported by two men, with his feet dragging on the ground. It was Ibn 'Abbas and another man.' I reported it to Ibn 'Abbas and he said, "Do you know who the other man was that 'A'isha did not name?' 'No,' I answered. He said, 'It was 'Ali.'" After the Prophet, may Allah bless him and grant him peace, had entered her room and his illness became severe, 'A'isha said that he said, "Pour over me seven waterskins full of water which have not been tied. Perhaps I will be able to instruct the people." She said, "We sat him in a tub belonging to Hafsa, the wife of the Prophet, may Allah bless him and grant him peace, and started to pour the water in those waterskins over him until he indicated to us to stop. Then he went out to the people and led them in the prayer and addressed them."