Musannaf Ibn Abi Shayba 8:2621

Abu Bakr narrated to us, he said: Abd al-A’la narrated to us, from Muhammad ibn Ishaq, from Hakim ibn Hakim, from Mas’ud ibn al-Hakam, from his mother, who said: It is as if I am looking at Ali upon the mule of the Messenger of Allah, may Allah bless him and grant him peace, saying: "These are not days of fasting; they are days of eating and drinking."