Musnad Abu Ya'la al-Mawsili 20:1

Ahmad ibn Ibrahim al-Dawraqi narrated to us, Abu Abd al-Rahman al-Muqri narrated to us, al-Mas'udi narrated to us, from Abu 'Amrah, from his father, who said: We came to the Messenger of Allah, may Allah bless him and grant him peace, as four men, and we had a horse with us. He gave each man among us one share, and he gave the horse two shares.