Ibn 'Abbas (May Allah be pleased with them) reported: The Messenger of Allah (ﷺ) observed Saum (fasting) on the day of 'Ashura' and commanded us to fast on this day.[Al-Bukhari and Muslim].

Ibn 'Abbas (May Allah be pleased with them) reported: The Messenger of Allah (ﷺ) observed Saum (fasting) on the day of 'Ashura' and commanded us to fast on this day.[Al-Bukhari and Muslim].

وعن ابن عباس رضي الله عنهما أن رسول الله صلى الله عليه وسلم صام يوم عاشوراء، وأمر بصيامه‏.‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏