ENOfficial
Abu Sa'id al-Khudri said that when they went out on an expedition with God’s messenger on the sixteenth of Ramadan some fasted and some broke their fast, but neither party found fault with the other. Muslim transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ قَالَ: غَزَوْنَا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَسِتَّ عَشْرَةَ مَضَتْ مِنْ شَهْرِ رَمَضَانَ فَمِنَّا مَنْ صَامَ وَمِنَّا مَنْ أَفْطَرَ فَلَمْ يَعِبِ الصَّائِمُ عَلَى الْمُفْطِرِ وَلَا الْمُفْطِرُ عَلَى الصَّائِمِ. رَوَاهُ مُسلم
sunnah.com