he heard Ibn 'Abbas, when he was asked about the fast of 'Ashura' say: "I do not know that the Prophet fasted any day because of its virtue, except this day" meaning the month of Ramadan and the day of Ashura.'  

مَا عَلِمْتُ النَّبِيَّ ﷺ صَامَ يَوْمًا يَتَحَرَّى فَضْلَهُ عَلَى الأَيَّامِ إِلاَّ هَذَا الْيَوْمَ يَعْنِي شَهْرَ رَمَضَانَ وَيَوْمَ عَاشُورَاءَ  

[Machine] He heard Ibn Abbas saying, "I haven't known the Messenger of Allah ﷺ to fast a day seeking its excellence over others, except for the Day of Ashura or Ramadan." He said, "The soul or the month of Ramadan."  

أَنَّهُ سَمِعَ ابْنَ عَبَّاسٍ يَقُولُ مَا عَلِمْتُ رَسُولَ اللهِ ﷺ كَانَ يَتَحَرَّى صِيَامَ يَوْمٍ يَبْتَغِي فَضْلَهُ عَلَى غَيْرِهِ إِلَّا هَذَا الْيَوْمَ لِيَوْمِ عَاشُورَاءَ أَوْ رَمَضَانَ قَالَ رَوْحٌ أَوْ شَهْرُ رَمَضَانَ  

[Machine] I heard Ibn Abbas say, "I never saw the Prophet ﷺ fasting a day seeking its reward over other days except for the day of Ashura. Sufyan also said on another occasion, 'Except for this day,' referring to the day of Ashura, 'and this month,' referring to the month of Ramadan."  

سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ مَا عَلِمْتُ رَسُولَ اللهِ ﷺ صَامَ يَوْمًا يَتَحَرَّى فَضْلَهُ عَلَى الْأَيَّامِ غَيْرَ يَوْمِ عَاشُورَاءَ وَقَالَ سُفْيَانُ مَرَّةً أُخْرَى إِلا هَذَا الْيَوْمَ يَعْنِي عَاشُورَاءَ وَهَذَا الشَّهْرَ شَهْرَ رَمَضَانَ  

he heard Ibn 'Abbas, when he was asked about the fast of 'Ashura' say: "I do not know that the Prophet fasted any day because of its virtue, except this day" meaning the month of Ramadan and the day of Ashura.' (Using translation from Nasāʾī 2370)  

«مَا عَلِمْتُ النَّبِيَّ ﷺ صَامَ يَوْمًا يَتَحَرَّى فَضْلَهُ عَلَى الْأَيَّامِ إِلَّا هَذَا الْيَوْمَ يَعْنِي شَهْرَ رَمَضَانَ وَيَوْمَ عَاشُورَاءَ»  

"عَنِ ابْنِ عَبَّاسٍ قَالَ: مَا كانَ رَسُولُ الله ﷺ يَتَحَرَّى صِيَامَ يَوْم يُبْتَغَى فَضْلهُ إِلا صِيَامَ رَمَضَانَ، وَهذَا الْيَوْمَ، يَوْمَ عَاشُورَاءَ".