Lu'lu' wal-Marjan

Umm al-Mu’minin Sayyida Aisha (may Allah be pleased with her) narrated that the Messenger of Allah (peace and blessings be upon him) once prayed in my house while he was ill. He was praying sitting down, and the people were standing behind him. The Prophet (peace be upon him) gestured to them to sit down, and after finishing the prayer, he said: “The Imam is appointed so that he may be followed. Therefore, when he goes into ruku‘, you should also go into ruku‘; and when he raises his head, you should also raise your heads; and when he says ‘Sami‘ Allahu liman hamidah’, you should say ‘Rabbana wa lakal hamd’; and when he prays sitting down, you should also pray sitting down.”