Musnad Ahmad 521:1

Marwan ibn Mu'awiyah al-Fazari narrated to us, Sufyan ibn Ziyad informed us, from Fatik ibn Fudalah, from Ayman ibn Khuraym, who said: The Messenger of Allah (peace and blessings of Allah be upon him) stood as a preacher and said: "O people, the testimony of falsehood has been made equal to associating partners with Allah," [repeating it] three times. Then he recited: "So avoid the impurity of idols and avoid false speech" [Al-Hajj: 30].