Sunan Abi Dawud
Sunan Abi Dawud 2443
Arabic hadith text
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ أَخْبَرَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ، قَالَ كَانَ عَاشُورَاءُ يَوْمًا نَصُومُهُ فِي الْجَاهِلِيَّةِ فَلَمَّا نَزَلَ رَمَضَانُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " هَذَا يَوْمٌ مِنْ أَيَّامِ اللَّهِ فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ " .
Translation
Ibn Umar reported: Ashura was a day we used to fast in pre-Islamic times. When Ramadan was prescribed, the Messenger of Allah said, "This is one of the days of Allah; whoever wishes may fast it, and whoever wishes may leave it."