[Machine] He heard Muawiyah giving a sermon in Medina, saying, "O people of Medina, where are your scholars? I heard the Messenger of Allah ﷺ saying, 'This is the day of Ashura, and fasting it is not obligatory upon us. So whoever among you wants to fast, let him fast. As for me, I am fasting, and the people are fasting as well."
أَنَّهُ سَمِعَ مُعَاوِيَةَ يَخْطُبُ بِالْمَدِينَةِ يَقُولُ يَا أَهْلَ الْمَدِينَةِ أَيْنَ عُلَمَاؤُكُمْ؟ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ هَذَا يَوْمُ عَاشُورَاءَ وَلَمْ يُفْرَضْ عَلَيْنَا صِيَامُهُ فَمَنْ شَاءَ مِنْكُمْ أَنْ يَصُومَ فَلْيَصُمْ فَإِنِّي صَائِمٌ فَصَامَ النَّاسُ