From Sahih Muslim (Hadith 4559):
Ibn 'Umar reported that Allah's Messenger (ﷺ) sent an expedition to Najd and Ibn Umar was also among the troops, and their share (of the spoils) came to twelve camels and they were given one camel over and above that. and Allah's Messenger (ﷺ) did not make any change in it
Reference: Muslim 4559