Musnad Ahmad 7:17

Yazid narrated to us, Baqiyyah ibn al-Walid narrated to us, Jubayr ibn ‘Amr narrated to me, from Abu Sa‘d al-Ansari, from Abu Yahya, the freed slave of the family of al-Zubayr ibn al-‘Awwam, from al-Zubayr ibn al-‘Awwam, who said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, while he was at ‘Arafah, reciting this verse: {Allah bears witness that there is no god but He, and the angels, and those of knowledge, [maintaining] in justice. There is no god but He, the Exalted in Might, the Wise} [Al ‘Imran: 18]. 'And I am among those who bear witness to that, O Lord.'"