Participation in the Battle of Badr
I will mention various expeditions in which Hazrat Uthman (ra) took part. As mentioned previously, Hazrat Uthman (ra) was not able to take part in the Battle of Badr because his wife, Hazrat Ruqayyah (ra), daughter of the Holy Prophet (sa), was extremely unwell. Owing to this, the Holy Prophet (sa) instructed Hazrat Uthman (ra) to remain behind in Medina in order to look after her but he considered Hazrat Uthman (ra) among those who participated in the battle. For this reason, he granted the same reward and the same number of provisions from the spoils of war as those who participated in the battle.
(Sharh Zurqani ala al-Mawahib al-Laduniyyah, Vol. 2, p. 334, Ghazwah Badr, Dar al-Kutub al-Ilmiyyah, Beirut, 1996)