When the Prophet (ﷺ) called the people (Sadqa, a sub-narrator, said, 'Most likely that happened on the day of Al-Khandaq) Az-Zubair responded to the call (i.e. to act as a scout). The Prophet) called the people again and Az-Zubair responded to the call. The Prophet (ﷺ) then said, "Every prophet had a disciple and my disciple is Zubair bin Al-`Awwam."
Sahih al-Bukhari Book 56, Hadith 63
← Previous Hadith The Prophet (ﷺ) said, "Who will bring me the information about the enemy on the day (of the battle) of Al-Ahzab (i.e. Clans)?" Az-Zubair said, "I will." The Prophet (ﷺ) said again, "Who will bring me the information about the enemy?" Az-Zubair said again, "I will." The Prophet (ﷺ) said, "Every prophet had a disciple and my disciple is Az-Zubair. "

Sahih al-Bukhari Book 56, Hadith 62 Next Hadith → On my departure from the Prophet (ﷺ) he said to me and to a friend of mine, "You two, pronounce the Adhan and the Iqama for the prayer and let the elder of you lead the prayer."

Sahih al-Bukhari Book 56, Hadith 64