Sahih al-Bukhari #4275 · Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)

Sahih al-BukhariUbaidullah bin 'Abdullah bin 'Utba
Sahih al-Bukhari · Book 64 · Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Sahih al-Bukhari · كتاب 64 · كتاب المغازي
Ibn 'Abbas said, Allah's Messenger (ﷺ) fought the Ghazwa (i.e. battles of Al-Fath during Ramadan." Narrated Az-Zuhri: Ibn Al-Musaiyab (also) said the same. Ibn 'Abbas added, "The Prophet (ﷺ) fasted and when he reached Al-Kadid, a place where there is water between Kudaid and 'Usfan, he broke his fast and did not fast afterwards till the whole month had passed away
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، حَدَّثَنَا اللَّيْثُ، قَالَ حَدَّثَنِي عُقَيْلٌ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي عُبَيْدُ اللَّهِ بْنُ عَبْدِ اللَّهِ بْنِ عُتْبَةَ، أَنَّ ابْنَ عَبَّاسٍ، أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم غَزَا غَزْوَةَ الْفَتْحِ فِي رَمَضَانَ‏.‏ قَالَ وَسَمِعْتُ ابْنَ الْمُسَيَّبِ يَقُولُ مِثْلَ ذَلِكَ‏.‏ وَعَنْ عُبَيْدِ اللَّهِ أَنَّ ابْنَ عَبَّاسِ ـ رضى الله
عنهما ـ قَالَ صَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم حَتَّى إِذَا بَلَغَ الْكَدِيدَ ـ الْمَاءَ الَّذِي بَيْنَ قُدَيْدٍ وَعُسْفَانَ ـ أَفْطَرَ، فَلَمْ يَزَلْ مُفْطِرًا حَتَّى انْسَلَخَ الشَّهْرُ‏.‏
Reference : Sahih al-Bukhari 4275In-book reference : Book 64, Hadith 309