Mishkat al-Masabih 2636
Jabir said :
In the year of al-Hudaibiya(6 A.H.) we, along with God's messenger, sacrificed a camel for seven people and a cow for seven people. 

Muslim transmitted it.
وَعَن جابرٍ قَالَ: نحَرْنا مَعَ رَسولِ اللَّهِ عَامَ الْحُدَيْبِيَةِ الْبَدَنَةَ عَنْ سَبْعَةٍ وَالْبَقَرَةَ عَنْ سَبْعَة. رَوَاهُ مُسلم