Jabir b. Abdullah reported:I heard Allah's Messenger (ﷺ) exhorting people on the Day of the Battle of the Ditch to fight. Zubair said: I am ready (to participate). He then again exhorted and he again said: I am ready to participate. Thereupon Allah's Messenger (ﷺ) said: Behold. for every Prophet there is a helper and my helper is Zubair

English translation · Sahih Muslim