I heard Messenger of Allah ﷺ exhorting people on the Day of the Battle of the Ditch to fight. Zubair said: I am ready (to participate). He then again exhorted and he again said: I am ready to participate. Thereupon Messenger of Allah ﷺ said: Behold. for every Prophet there is a helper and my helper is Zubair.
سَمِعْتُهُ يَقُولُ نَدَبَ رَسُولُ اللَّهِ ﷺ النَّاسَ يَوْمَ الْخَنْدَقِ فَانْتَدَبَ الزُّبَيْرُ ثُمَّ نَدَبَهُمْ فَانْتَدَبَ الزُّبَيْرُ ثُمَّ نَدَبَهُمْ فَانْتَدَبَ الزُّبَيْرُ فَقَالَ النَّبِيُّ ﷺ لِكُلِّ نَبِيٍّ حَوَارِيٌّ وَحَوَارِيَّ الزُّبَيْرُ