[Machine] I heard Ibn Abbas say that the Messenger of Allah ﷺ fasted on the day of Ashura and commanded others to fast as well. They said, "O Messenger of Allah, it is a day revered by the Jews and Christians." The Messenger of Allah ﷺ replied, "When the next year comes, if Allah wills, we will fast on the ninth day." However, the next year did not come as the Messenger of Allah ﷺ passed away.
سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ صَامَ رَسُولُ اللهِ ﷺ يَوْمَ عَاشُورَاءَ وَأَمَرَ بِصِيَامِهِ فَقَالُوا يَا رَسُولَ اللهِ يَوْمًا يُعَظِّمُهُ الْيَهُودُ وَالنَّصَارَى فَقَالَ رَسُولُ اللهِ ﷺ «إِذَا كَانَ عَامُ الْمُقْبِلِ إِنْ شَاءَ اللهُ صُمْنَا التَّاسِعَ» فَلَمْ يَأْتِ عَامُ الْمُقْبِلِ حَتَّى تُوُفِّيَ رَسُولُ اللهِ ﷺ