سنن نسائي
Sunan an-Nasa'i
كتاب الصيام
The Book of Fasting
بَابُ : إِذَا لَمْ يُجْمِعْ مِنَ اللَّيْلِ هَلْ يَصُومُ ذَلِكَ الْيَوْمَ مِنَ التَّطَوُّعِ .
Chapter: If a person did not form the intention of fasting from the night before, can he observe a voluntary fast that day?
Hadith 2323
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى ، قَالَ : حَدَّثَنَا يَحْيَى ، عَنْ يَزِيدَ ، قَالَ : حَدَّثَنَا سَلَمَةُ ، أَنَّ ّرَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لِرَجُلٍ : " أَذِّنْ يَوْمَ عَاشُورَاءَ مَنْ كَانَ أَكَلَ فَلْيُتِمَّ بَقِيَّةَ يَوْمِهِ ، وَمَنْ لَمْ يَكُنْ أَكَلَ فَلْيَصُمْ " .
´It was narrated that Yazid said:` "Salamah told us that the Messenger of Allah said to a man: 'Announce the day of Ashura. Whoever has eaten let him not eat for the rest of the day, and whoever has not eaten, let him fast."'
