Musnad Abu Ya'la al-Mawsili 161:5

Ubayd Allah ibn Mu'adh narrated to us, my father narrated to us, Shu'bah narrated to us, from Abbas al-Jurayri, from Abu Uthman, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) divided seven dates among us. We were seven, and he gave us one date each.