Hasan al-Basri narrates: When the Prophet Muhammad (peace be upon him) was ill for ten days, during nine of those days, Sayyiduna Abu Bakr (may Allah be pleased with him) led the people in prayer. On the tenth day, when the Prophet (peace be upon him) felt some improvement, he came out walking with the support of Sayyiduna Fadl bin Abbas (may Allah be pleased with him) and Sayyiduna Usama bin Zaid (may Allah be pleased with him), and he performed the prayer sitting, following Sayyiduna Abu Bakr (may Allah be pleased with him) as the imam.