Sunan an Nasai
The Book of the Etiquette of Judges
Hadith #46
49.46
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا عَبْدُ الأَعْلَى، قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنْ سَعِيدِ بْنِ أَبِي بُرْدَةَ، عَنْ أَبِيهِ، عَنْ أَبِي مُوسَى، أَنَّ رَجُلَيْنِ، اخْتَصَمَا إِلَى النَّبِيِّ صلى الله عليه وسلم فِي دَابَّةٍ لَيْسَ لِوَاحِدٍ مِنْهُمَا بَيِّنَةٌ فَقَضَى بِهَا بَيْنَهُمَا نِصْفَيْنِ .
It was narrated from Abu Musa:That two men referred a dispute to the Prophet [SAW] concerning an animal, and neither of them had any evidence, so he ruled that it be shared equally between them