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."
سَمِعْتُ جَابِرَ بْنَ عَبْدِ اللَّهِ ؓ يَقُولُ نَدَبَ النَّبِيُّ ﷺ النَّاسَ يَوْمَ الْخَنْدَقِ فَانْتَدَبَ الزُّبَيْرُ ثُمَّ نَدَبَهُمْ فَانْتَدَبَ الزُّبَيْرُ ثُمَّ نَدَبَهُمْ فَانْتَدَبَ الزُّبَيْرُ قَالَ النَّبِيُّ ﷺ إِنَّ لِكُلِّ نَبِيٍّ حَوَارِيًّا وَحَوَارِيَّ الزُّبَيْرُ قَالَ سُفْيَانُ الْحَوَارِيُّ النَّاصِرُ