Battle of Hunayn
Usama had a close relationship with Muhammad and he fought with Muhammad in the Battle of Hunayn. Ibn Kathir writes that according to Ibn Ishaq, Jabir ibn Abd Allah, who witnessed the battle, reported that the Muslim army were panicked by a surprise attack from the enemy and many men fled the battlefield. However, a group of Muhajirun stood firmly and defended Muhammad the battlefield. These men were Abu Bakr, Umar, Ali, Abbas ibn Abd al-Muttalib, Abu Sufyan ibn al-Harith, Fadl ibn Abbas, Rabi'ah ibn al-Harith, Usama ibn Zayd and Ayman ibn Ubayd. Usama's half-brother Ayman ibn Ubayd was killed that day whilst defending Muhammad.