the fasting the day on Ashura

حدثنا مسدد حدثنا إسماعيل عن أيوب عن نافع عن ابن عمر رضى الله تعالى عنهما قال صام النبي ﷺ عاشوراء وأمر بصيامه فلما فرض رمضان ترك وكان عبد الله لا يصومه إلا أن يوافق صومه

Musaddad told us, Ismail told us, on the authority of Ayyub, on the authority of Nafi`, on the authority of Ibn Umar, may God be pleased with them both, who said: fasted When Ramadan was obligatory, he left it, and Abdullah did not fast it, unless it coincided with his fast.