حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، أَنْبَأَنَا حَمَّادُ بْنُ زَيْدٍ، حَدَّثَنَا غَيْلاَنُ بْنُ جَرِيرٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِيِّ، عَنْ أَبِي قَتَادَةَ، قَالَ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ صِيَامُ يَوْمِ عَاشُورَاءَ إِنِّي أَحْتَسِبُ عَلَى اللَّهِ أَنْ يُكَفِّرَ السَّنَةَ الَّتِي قَبْلَهُ ‏"‏ ‏.‏

It wasnarrated that Ibn ‘Abbas said

“The Prophet (ﷺ) came toAl-Madinah, and he found the Jews observing a fast. He said: ‘Whatisthis?’ They said: ‘This is the day when Allah saved Musa anddrownedPharaoh, so Musa fasted this day in gratitude.’ TheMessenger of Allah(ﷺ) said: ‘We have more right to Musa than youdo.’ So he fasted(that day) and enjoined (others) to fast italso.’”