Sahih Muslim 1815b
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.
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا حَاتِمٌ، بِهَذَا الإِسْنَادِ . غَيْرَ أَنَّهُ قَالَ فِي كِلْتَيْهِمَا سَبْعَ غَزَوَاتٍ .
• Sahih Muslim 1815b
• Sahih Muslim Vol. 4, Book of Jihad and Expedition, Hadith 4470
• Sahih Muslim, Book of Jihad and Expedition, Hadith 4470