كتاب الجهاد والسير
32  
The Book of Jihad and Expeditions
(12)
Chapter: Spoils of War
(12)
باب الأَنْفَالِ ‏‏
Sahih Muslim 1749 b

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.

وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا لَيْثٌ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ، أَخْبَرَنَا اللَّيْثُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم بَعَثَ سَرِيَّةً قِبَلَ نَجْدٍ وَفِيهِمُ ابْنُ عُمَرَ وَأَنَّ سُهْمَانَهُمْ بَلَغَتِ اثْنَىْ عَشَرَ بَعِيرًا وَنُفِّلُوا سِوَى ذَلِكَ بَعِيرًا فَلَمْ يُغَيِّرْهُ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏.‏
Reference : Sahih Muslim 1749b
In-book reference : Book 32, Hadith 40
USC-MSA web (English) reference : Book 19, Hadith 4331
  (deprecated numbering scheme)