The Bani Nadir were expelled, the Bani Quraiza slaughtered.
First he swept down on the Bani Hanifa in Yemama, who with their rival prophet Mosailama (Mosailima) and 40,000 men were in arms. The battle of Yemama (633) was fierce and decisive.
The Bani Hanifa returned to Islam.
In his appointments to governorships and other offices, as well as in his distribution of spoil, Othman showed a marked preference for the members of his own tribe the Koreish (Quraish) and the members of his own family the Bani Omayya (Umayya).
After them the Bani Nebhan gained the upper hand and established a succession of kings (maliks) who governed from 1154 to 1406.