Sayyiduna Abdullah (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that he (peace be upon him) led five rak‘ahs in the Zuhr prayer. So one of the people said, "Has something been added to the prayer?" The Prophet (peace be upon him) asked, "What (addition) is that?" He replied, "You led five rak‘ahs." So after saying the salam, the Prophet (peace be upon him) performed two prostrations. This is the hadith of Muhammad bin Bakr.