Husain reported on the authority of the children of Saad bin Muadh that Usaid bin Hudair used to act as their Imam. (when he fell ill) the Messenger of Allah ﷺ came to him inquiring about his illness. They said: Messenger of Allah, our Imam is ill. He said: When he prays sitting, pray sitting. Abu Dawud said: The chain of this tradition is not continuous (muttasil)