From Sahih Bukhari (Hadith 3134):
Narrated Nafi` from Ibn `Umar:Allah's Messenger (ﷺ) sent a Sariya towards Najd, and `Abdullah bin `Umar was in the Sariya. They gained a great number of camels as war booty. The share of each one of them was twelve or eleven camels, and they were given an extra camel each
Reference: Bukhari 3134