Narrated to me by the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, who said: Abu Al-Qasim Ja'far bin Muhammad narrated to me, from Muhammad bin Ya'qub, from Ali bin Ibrahim, from Muhammad bin Isa, from Yunus, from some of our companions, from Abu Abdullah عليه السلام, who said: Imam عليه السلام said: 'The Messenger of Allah سبحانه وتعالى (may Allah سبحانه وتعالى bless him and his family) forbade a man from performing istinja (cleansing after relieving oneself) with his right hand.'