حَدَّثَنَا إِسْمَاعِيلُ أَخْبَرَنَا أَيُّوبُ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ أَنَّهُ قَالَ فِي عَاشُورَاءَ صَامَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَمَرَ بِصَوْمِهِ فَلَمَّا فُرِضَ رَمَضَانُ تُرِكَ فَكَانَ عَبْدُ اللَّهِ لَا يَصُومُهُ إِلَّا أَنْ يَأْتِيَ عَلَى صَوْمِهِ
مسند امام احمد بن حنبل · Hadith 4483
It was narrated from Ibn 'Umar that he said concerning 'Ashoora': The Messenger of Allah (PBUH) fasted it and instructed (people) to fast it, then when Ramadan was made obligatory it was abandoned. 'Abdullah used not to fast it unless it coincided with a day when he usually fasted.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020