Sayyiduna Abdullah bin Buhaina Asadi (may Allah be pleased with him), who was an ally of Abdul Muttalib, narrates: The Prophet Muhammad (peace be upon him) stood up during the Zuhr prayer at a point when he was supposed to sit. When he completed the prayer, before saying the salam, he performed two prostrations while sitting. The people with him also performed these two prostrations. This was in place of the sitting that he had forgotten.