Muhammad ibn Ahmad ibn Yahya from Salamah from Sulayman ibn Sama'ah from his uncle from Imam Ja’far عليه السلام, from his father عليه السلام, from his forefathers, peace be upon them: Imam al-Sadiq عليه السلام said: “The Messenger of Allah سبحانه وتعالى, may Allah سبحانه وتعالى bless him and his family, said: ‘Whoever leads a group in prayer and singles himself out in supplication has betrayed them.’”