Full Sharh — Sahih al-Bukhari 4737
حَدَّثَنِي يَعْقُوبُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا رَوْحٌ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا أَبُو بِشْرٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ لَمَّا قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ، وَالْيَهُودُ تَصُومُ عَاشُورَاءَ، فَسَأَلَهُمْ، فَقَالُوا هَذَا الْيَوْمُ الَّذِي ظَهَرَ فِيهِ مُوسَى عَلَى فِرْعَوْنَ، فَقَالَ النَّبِيُّ صلى الله عليه وسلم " نَحْنُ أَوْلَى بِمُوسَى مِنْهُمْ فَصُومُوهُ ".
English Translation
Narrated Ibn `Abbas:When Allah's Messenger (ﷺ) arrived at Medina, he found the Jews observing the fast on the day of 'Ashura' (10th of Muharram). The Prophet (ﷺ) asked them (about it) and they replied, "This is the day when Moses became victorious over Pharaoh." The Prophet (ﷺ) said (to the Muslims), "We are nearer to Moses than they, so fast on this day
Source
Sahih al-Bukhari(صحيح البخاري)
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Hadith Number
4737