حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ أَخْبَرَنَا ابْنُ أَبِي ذِئْبٍ وَرَوْحٌ قَالَ ثَنَا ابْنُ أَبِي ذِئْبٍ عَنِ الْقَاسِمِ بْنِ عَبَّاسٍ عَنْ عَبْدِ اللَّهِ بْنِ عُمَيْرٍ مَوْلَى ابْنِ عَبَّاسٍ عَنِ ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَئِنْ عِشْتُ قَالَ رَوْحٌ لَئِنْ سَلِمْتُ إِلَى قَابِلٍ لَأَصُومَنَّ التَّاسِعَ يَعْنِي عَاشُورَاءَ
مسند امام احمد بن حنبل · Hadith 2106
It was narrated from Ibn 'Abbas (RA) that the Messenger of Allah (PBUH) said: "If I live - Rawh said: If I am still sound - until next year, I will definitely fast the ninth," meaning the day before 'Ashoora'.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020