Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) said: "This is the day of Ashura, and the Quraysh used to fast on it during the days of ignorance. So whoever among you wishes may fast on Ashura, and whoever wishes to leave it may leave it." And Sayyiduna Ibn Umar (may Allah be pleased with them both) did not specifically fast on Ashura, except that if Ashura came during the days he was fasting, he would complete his fasts.