[Machine] Abdullah bin Umar narrated that the Messenger of Allah ﷺ sent a mission before Najd, and in that mission he sent a small group which included Abdullah bin Umar. Abdullah bin Umar reported that the arrows in that mission reached twelve camels and the companions of the group, including Abdullah bin Umar, offered animals for sacrifice in addition to that - a camel for each sacrifice. So, the companions of the group had thirteen camels, and the companions of the main mission had twelve.  

عَبْدُ اللهِ بْنُ عُمَرَ إِنَّ رَسُولَ اللهِ ﷺ بَعَثَ بَعْثًا قِبَلَ نَجْدٍ فَبَعَثَ مِنْ ذَلِكَ الْبَعْثِ سَرِيَّةً فِيهِمْ عَبْدُ اللهِ بْنُ عُمَرَ فَحَدَّثَ عَبْدُ اللهِ بْنُ عُمَرَ أَنَّ سِهَامَ الْبَعْثِ بَلَغَتِ اثْنَيْ عَشَرَ بَعِيرًا وَنُفِّلَ أَصْحَابُ السَّرِيَّةِ الَّتِي فِيهَا عَبْدُ اللهِ بْنُ عُمَرَ سِوَى ذَلِكَ بَعِيرًا بَعِيرًا فَكَانَ لِأَصْحَابِ السَّرِيَّةِ ثَلَاثَةَ عَشَرَ ثَلَاثَةَ عَشَرَ وَلِأَصْحَابِ الْبَعْثِ اثْنَا عَشَرَ اثْنَا عَشَرَ