Musnad Ahmad 932:15

Abdullah narrated to us, al-Hasan ibn Qaza’ah Abu Ali al-Basri narrated to us, Sufyan ibn Habib narrated to us, Shu’bah narrated to us, from Thuwair, from his father, from al-Tufayl, from his father, that he heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "And He made them adhere to the word of righteousness" [Al-Fath: 26]. He said: "There is no god but Allah."