Humaid bin Abdur Rahman narrates: On the day of Ashura, I heard Sayyiduna Muawiyah bin Sufyan (may Allah be pleased with him) while he was present on the pulpit of the Prophet (peace and blessings of Allah be upon him). He said: I heard the Prophet (peace and blessings of Allah be upon him) say: "I am fasting, so whoever among you wishes to fast on this day, let him fast."