The Book of Jihad and Expeditions
32/49. Chapter:
The number of campaigns of the Prophet (saws)
Sahih Muslim
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا حَاتِمٌ، بِهَذَا الإِسْنَادِ . غَيْرَ أَنَّهُ قَالَ فِي كِلْتَيْهِمَا سَبْعَ غَزَوَاتٍ .
The (foregoing) tradition has also been narrated on the authority of Hatim through the same chain of transmitters with the difference that according to this version both these types of expeditions were seven in number.
Reference : Sahih Muslim 1815bIn-book reference : Book 32, Hadith 180USC-MSA web (English) reference : Book 19, Hadith 4470