It is narrated from Humaid bin Abdur Rahman bin Awf that he heard from Sayyiduna Muawiyah bin Abi Sufyan, may Allah be pleased with them both, who said, the year he performed Hajj and he was on the pulpit: O people of Madinah! Where are your scholars? I heard the Messenger of Allah, peace and blessings be upon him, say about this day: "This is the day of Ashura, fasting on this day is not obligatory upon you, and I am fasting. So whoever wishes may fast, and whoever wishes may not fast."