Full Sharh — Sahih Muslim 2745
وَحَدَّثَنِي عَبْدُ اللَّهِ بْنُ مُحَمَّدِ بْنِ أَسْمَاءَ الضُّبَعِيُّ، حَدَّثَنَا مَهْدِيٌّ، - وَهُوَ ابْنُ مَيْمُونٍ - حَدَّثَنَا غَيْلاَنُ بْنُ جَرِيرٍ، عَنْ مُطَرِّفٍ، عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، - رضى الله عنهما - أَنَّصلى الله عليه وسلم قَالَ لَهُ أَوْ قَالَ لِرَجُلٍ وَهُوَ يَسْمَعُ " يَا فُلاَنُ أَصُمْتَ مِنْ سُرَّةِ هَذَا الشَّهْرِ " . قَالَ لاَ . قَالَ " فَإِذَا أَفْطَرْتَ فَصُمْ يَوْمَيْنِ " .
English Translation
Imran b. Husain (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) said to him (or he said to another person and he was listening to it):O, so and so, did you observe fast in the middle of the month? He said: No. Thereupon he (the Messenger of Allah) said: When you break it, then observe fast for two days
Source
Sahih Muslim(صحيح مسلم)
The Book of Fasting
Hadith Number
2745