Muhammad bin Ali bin Abi Talib (may Allah have mercy on him) relates: I said to Sayyiduna Ali bin Abi Talib (may Allah be pleased with him): "People claim, concerning the words of Allah, the Mighty and Majestic, 'And a witness from Him follows it,' that you are the one (the witness who follows)?" He said: "I wished that I were he, but it refers to the tongue of Muhammad (peace and blessings be upon him)."
Imam al-Tabarani (may Allah have mercy on him) said: "Khulayd bin Da'laj is alone in narrating this hadith from Qatadah, from Urwah, and al-Walid bin Muslim is alone in narrating it from him."