The Book of Jihad and Expeditions
وَحَدَّثَنَا سُرَيْجُ بْنُ يُونُسَ، وَعَمْرٌو النَّاقِدُ، - وَاللَّفْظُ لِسُرَيْجٍ - قَالاَ حَدَّثَنَا عَبْدُ، اللَّهِ بْنُ رَجَاءٍ عَنْ يُونُسَ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنْ أَبِيهِ، قَالَ نَفَّلَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم نَفَلاً سِوَى نَصِيبِنَا مِنَ الْخُمْسِ فَأَصَابَنِي شَارِفٌ وَالشَّارِفُ الْمُسِنُّ الْكَبِيرُ A hadith has been narrated by Salim who learnt it from his father and said:The Messenger of Allah (ﷺ) gave us an extra (camel) besides our share of Khums; (and in this extra share) I got a Sharif (and a Sharif is a big old camel)
From Sahih Muslim, whose reports the scholars accept as authentic.