The Book of Fasting
22/82. Chapter:
Mentioning The Differences Reported From Abu 'Uthman In The Hadith Of Abu Hurairah Regarding Fasting Three Days Out Of Each Month
Sunan an-Nasai
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ سَعِيدِ بْنِ أَبِي هِنْدٍ، أَنَّ مُطَرِّفًا، حَدَّثَهُ أَنَّ عُثْمَانَ بْنَ أَبِي الْعَاصِ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " صِيَامٌ حَسَنٌ ثَلاَثَةُ أَيَّامٍ مِنَ الشَّهْرِ " .
'Uthman bin Abi Al-As said: "I heard the Messenger of Allah say: 'It is a good fast to fast three days of each month".
Reference : Sunan an-Nasa'i 2411In-book reference : Book 22, Hadith 322English translation : Vol. 3, Book 22, Hadith 2413