(135) باب السَّيْرِ وَحْدَهُ
Narrated Jabir bin `Abdullah:
On the day of the battle of the Trench, the Prophet (ﷺ) wanted somebody from amongst the people to volunteer to be a reconnoitre. Az-Zubair volunteered. He demanded the same again and Az-Zubair volunteered again. Then he repeated the same demand (thrice) and AzZubair volunteered once more. The Prophet (ﷺ) then said, " Every prophet has a disciple and my disciple is Az-Zubair."
Reference: Sahih al-Bukhari 2997
In-book reference: Book 56, Hadith 206
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 240