Sahih al-Bukhari 2000

Book 30: Fasting · Narrated by Salim's father

Arabic

حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ عُمَرَ بْنِ مُحَمَّدٍ، عَنْ سَالِمٍ، عَنْ أَبِيهِ ـ رضى الله عنه ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم يَوْمَ عَاشُورَاءَ ‏ "‏ إِنْ شَاءَ صَامَ ‏"‏‏.‏

English translation

Narrated Salim's father:The Prophet (ﷺ) said, "Whoever wishes may fast on the day of 'Ashura

Reference: Sahih al-Bukhari 2000, Book of Fasting. English translation by Dr. Muhammad Muhsin Khan.