Musnad Abu Ya'la al-Mawsili 243:59

Hadba ibn Khalid narrated to us, Hammam narrated to us, Qatada narrated to us, from Sa'id ibn Abi Burda, from his father, from Abu Musa: That two men claimed a camel, and each of them sent two witnesses. So the Messenger of Allah (may Allah bless him and grant him peace) divided it between them.