"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 ) (Using translation from Nasāʾī 4393)  

كُنَّا نَتَمَتَّعُ مَعَ النَّبِيِّ ﷺ «فَنَذْبَحُ الْبَقَرَةَ عَنْ سَبْعَةٍ نَشْتَرِكُ فِيهَا»