The Book of Jihad and Expeditions
32/49. Chapter:
The number of campaigns of the Prophet (saws)
Sahih Muslim
وَحَدَّثَنِي أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا مُعْتَمِرُ بْنُ سُلَيْمَانَ، عَنْ كَهْمَسٍ، عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، أَنَّهُ قَالَ غَزَا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم سِتَّ عَشْرَةَ غَزْوَةً .
It has been narrated by Buraida who heard it from his father that he joined the Messenger of Allah (ﷺ) in sixteen military campaigns
Reference : Sahih Muslim 1814bIn-book reference : Book 32, Hadith 178USC-MSA web (English) reference : Book 19, Hadith 4468