it wasnarrated that Ibn 'Abbas said:
"We were with the Messenger ofAllah (ﷺ) on a journey, and the (day of) Al-Adha came. We(sacrificed) one camel on behalf of ten (people) and one cow onbehalfof seven." (FR)
English reference (FR): Vol. 4, Book 26, Hadith 3131 (FR)
Arabic reference (FR): Book 26, Hadith 3251 (FR)