Sahih Al Bukhari (580)

عن الزهري قال أخبرني عبيدالله بن عبدالله قالت عائشة رضي الله عنها {لما ثقل النبي (صلى الله عليه وسلم) فاشتد وجعه استأذن أزواجه أن يمرض في بيتي فأذن له فخرج بين رجلين تخط رجلاه الأرض وكان بين العباس وبين رجل آخر} فقال عبيد الله فذكرت لابن عباس ما قالت عائشة فقال لي وهل تدري من الرجل الذي لم تسم عائشة قلت لا قال هو علي بن أبي طالب.

Az-Zuhari reported: ‘Ubaydullah ibn `Abdullah told me that `A'ishah had said: "When the Prophet (peace be upon him) became sick and his condition became serious, he requested his wives to allow him to be treated in my house, and they allowed him. He came out leaning on two men while his feet were dragging on the ground. He was walking between Al-`Abbas and another man." `Ubaydullah said: "When I informed Ibn `Abbas of what `A'ishah had said, he asked me whether I knew who was the second man whom `A'ishah had not named. I replied in the negative. He said, 'He was 'Ali ibn Abu Talib."