The Book of Fasting
13/37. Chapter:
Fasting at the end of Sha'ban
Sahih Muslim
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنِ ابْنِ أَخِي، مُطَرِّفِ بْنِ الشِّخِّيرِ قَالَ سَمِعْتُ مُطَرِّفًا، يُحَدِّثُ عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، - رضى الله عنهما - أَنَّصلى الله عليه وسلم قَالَ لِرَجُلٍ " هَلْ صُمْتَ مِنْ سِرَرِ هَذَا الشَّهْرِ شَيْئًا " . يَعْنِي شَعْبَانَ . قَالَ لاَ . قَالَ فَقَالَ لَهُ " إِذَا أَفْطَرْتَ رَمَضَانَ فَصُمْ يَوْمًا أَوْ يَوْمَيْنِ " . شُعْبَةُ الَّذِي شَكَّ فِيهِ قَالَ وَأَظُنُّهُ قَالَ يَوْمَيْنِ .
'Imran b. Husain (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) said to a person: Did you observe fast in the middle of this month. i. e. Sha'ban? He said: No. Thereupon he said to him: When it is the end of Ramadan, then observe fast for one day or two (Shu'ba had some doubt about it) but he said: I think that he has said: two days.
Reference : Sahih Muslim 1161dIn-book reference : Book 13, Hadith 259USC-MSA web (English) reference : Book 6, Hadith 2609