حَدَّثَنَا هَدَّابُ بْنُ خَالِدٍ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ ثَابِتٍ، عَنْ مُطَرِّفٍ، - وَلَمْ أَفْهَمْ مُطَرِّفًا مِنْ هَدَّابٍ - عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، - رضى الله عنهما - أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ لَهُ أَوْ لآخَرَ ‏"‏ أَصُمْتَ مِنْ سَرَرِ شَعْبَانَ ‏"‏ ‏.‏ قَالَ لاَ ‏.‏ قَالَ ‏"‏ فَإِذَا أَفْطَرْتَ فَصُمْ يَوْمَيْنِ ‏"‏ ‏.‏

'Imran b. Husain (Allah be pleased with them) reported Allah's Messenger (may peace he upon him) having said to him or to someone else: Did you fast in the middle of Sha'ban? He said: No. Thereupon he (the Holy Prophet) said: If you did not observe fast, then you should observe fast for two days. Translation Not Available

Book Ref: Sahih Muslim Book 13 Hadith 2607
Web Ref:  Sahih Muslim Book 6 Hadith 1161 b