This hadith has been narrated on the authority of Abu Ya'fur with the same chain of transmitters. Abu Bakr (RA) (one of the narrators) said "seven expeditions," whereas Ishaq said "six," and Ibn 'Umar (RA) said "six" or "seven".
Hadith Referenceصحيح مسلم / كتاب الصيد والذبائح وما يؤكل من الحيوان / 1952