Musnad Ahmad 5:146

Ya'qub narrated to us, my father narrated to us, from Ibn Ishaq, Abdullah ibn Abi Salamah narrated to me, from Mas'ud ibn al-Hakam al-Ansari, then al-Zuraqi, from his mother, that she narrated to him, saying: It is as if I am looking at Ali ibn Abi Talib, and he was upon the white mule of the Messenger of Allah, peace and blessings of Allah be upon him, when he stood at the mountain pass of the Ansar during the Farewell Pilgrimage, and he was saying: "O people, the Messenger of Allah, peace and blessings of Allah be upon him, says: 'These are not days of fasting; they are only days of eating, drinking, and remembrance.'"