Volume 5, Book 59, Number 313:
Narrated ‘Urwa:
On the day of (the battle) of Al-Yarmuk, the companions of Allah’s Apostle said to Az-Zubair,
“Will you attack the enemy so that we shall attack them with you?” Az-Zubair replied, “If I attack
them, you people would not support me.” They said, “No, we will support you.” So Az-Zubair attacked
them (i.e. Byzantine) and pierced through their lines, and went beyond them and none of his com –
panions was with him. Then he returned and the enemy got hold of the bridle of his (horse) and
struck him two blows (with the sword) on his shoulder. Between these two wounds there was a scar
caused by a blow, he had received on the day of Badr (battle). When I was a child I used to play with
those scars by putting my fingers in them. On that day (my brother) “Abdullah bin Az-Zubair was
also with him and he was ten years old. Az-Zubair had carried him on a horse and let him to the
care of some men.