It is narrated from Sayyiduna Qais bin Sa'd that before the command of fasting in the month of Ramadan was revealed, the Prophet (peace and blessings be upon him) ordered us to fast on the day of Ashura. When the command to fast in the month of Ramadan was revealed, the Prophet (peace and blessings be upon him) neither ordered us to fast on Ashura nor forbade it, but we ourselves continued to fast.