Narrated to us Harmalah ibn Yahya: Ibn Wahb informed us: Yunus informed me, from Ibn Shihab: Urwah ibn al-Zubayr informed me that A'ishah, may Allah be pleased with her, said: "The Messenger of Allah, peace and blessings be upon him, used to command fasting on it (the day of 'Ashura') before Ramadan was made obligatory. When Ramadan was made obligatory, whoever wished fasted on the day of 'Ashura' and whoever wished broke his fast."