Standard Bearer of the Holy Prophet (sa)

There is also a tradition that the Holy Prophet (sa) had given Islam’s first flag to Hazrat Hamza (ra), but there are other traditions that the expeditions led by Hazrat Abu Ubaidah (ra) and Hazrat Hamza (ra) were sent simultaneously, which castes some doubt over it. In any case it is established that Hazrat Hamza (ra) was the standard bearer of the Holy Prophet (sa) in the Battle of Banu Qainuqah in 2 Hijrah.

(Sirat Ibn-e-Hisham, p. 283, Bab Sariyatu Hamza, Daru Ibn Hazm, 2009, Beirut)