عَنْ ثُوَيْرٍ قَالَ: سَمِعْتُ عَبْدَ اللَّهِ بْنَ الزُّبَيْرِ رَضِيَ اللَّهُ عَنْهُمَا وَهُوَ عَلَى الْمِنْبَرِ يَقُولُ: هَذَا يَوْمُ عَاشُورَاءَ فَصُومُوهُ فَإِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَمَرَ بِصِيَامِهِ
Thuwair says: I heard Sayyiduna Abdullah bin Zubair (may Allah be pleased with him) saying on the pulpit: This is the Day of Ashura, you should fast on this day, because the Messenger of Allah (peace and blessings be upon him) ordered to fast on this day.