Sunan An-Nasa'i - سنن النسائي
43. The Book of ad-Dahaya (Sacrifices) - كتاب الضحايا
16) Chapter: What Is Equivalent To A Cow For Sacrifice
It was narrated that Jabir said:
"We would make Tamattu' when the Prophet was with us, and we would sacrifice a cow on behalf of seven people, sharing it among ourselves." (Sahih )
16) باب مَا تُجْزِئُ عَنْهُ الْبَقَرَةُ فِي الضَّحَايَا
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ يَحْيَى، عَنْ عَبْدِ الْمَلِكِ، عَنْ عَطَاءٍ، عَنْ جَابِرٍ، قَالَ كُنَّا نَتَمَتَّعُ مَعَ النَّبِيِّ صلى الله عليه وسلم فَنَذْبَحُ الْبَقَرَةَ عَنْ سَبْعَةٍ وَنَشْتَرِكُ فِيهَا .