Sahih al-Bukhari 3135
Sahih al-Bukhari · Book 57: One-fifth of Booty to the Cause of Allah (Khumus) · Khumus is to be used for the needs of the Muslims
Narrated Ibn `Umar:
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ ، أَخْبَرَنَا اللَّيْثُ ، عَنْ عُقَيْلٍ ، عَنِ ابْنِ شِهَابٍ ، عَنْ سَالِمٍ ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُنَفِّلُ بَعْضَ مَنْ يَبْعَثُ مِنَ السَّرَايَا لأَنْفُسِهِمْ خَاصَّةً سِوَى قِسْمِ عَامَّةِ الْجَيْشِ.
Allah's Messenger (ﷺ) used to give extra share to some of the members of the Sariya he used to send, in addition to the shares they shared with the army in general.