From Sahih Bukhari (Hadith 4113):
Narrated Jabir:On the day of Al-Ahzab (i.e. clans), Allah's Messenger (ﷺ) said, 'Who will bring us the news of the people (i.e. the clans of Quraish infidels)?" Az-Zubair said, "I." The Prophet (ﷺ) again said, "Who will bring us the news of the people?" Az-Zubair said, "I." The Prophet (ﷺ) again said, "Who will bring us the news of the people?" Az-Zubair said, "I." The Prophet (ﷺ) then said, "Every prophet has his Hawari (i.e. disciple - special helper); my disciple is Az-Zubair
Reference: Bukhari 4113