Volume 4, Book 52, Number 240:
Narrated Jabir bin ‘Abdullah:
On the day of the battle of the Trench, the Prophet 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 then said, ” Every prophet has a disciple and my disciple is Az-Zubair.”