Mishkat al-Masabih 3991
He said:
God’s Messenger gave us booty apart from our share of the fifth, and I got a sharif , which is a very old camel. 

(Bukhari and Muslim.)
وَعَنْهُ قَالَ: نَفَّلَنَا رَسُولُ اللَّهِ صلى الله عَلَيْهِ وَسلم نَفَلًا سِوَى نَصِيبِنَا مِنَ الْخُمُسِ فَأَصَابَنِي شَارِفٌ والشارف: المسن الْكَبِير