Sayyiduna Ash'ath (may Allah have mercy on him) came to Sayyiduna Abdullah bin Mas'ud while he was eating. Ash'ath said, "Today is the day of 'Ashura." Sayyiduna Ibn Mas'ud (may Allah be pleased with him) said, "In those days, the fast of 'Ashura was observed before the fasting of Ramadan was prescribed, but when the command for fasting in Ramadan was revealed, this fast was abandoned. Come, you also join in the meal."