Jihad (Kitab Al-Jihad)
Dawud :: Book 14 : Hadith 2720
Narrated Abdullah ibn Umar:
The Apostle of Allah (peace_be_upon_him) stood up, i.e. on the day of Badr, and said: Uthman has gone off on the business of Allah and His Apostle, and I shall take the oath of allegiance on his behalf. The Apostle of Allah (peace_be_upon_him) then allotted him a share, but did not do so for anyone else who was absent.