What happened to Sa'd bin Mu'ad after he was injured in the Battle of Trench (also known as Al-Khandaq) and was attended by the Prophet Muhammad (saw)?
 Narrated `Aisha:                     On the day of Al-Khandaq (battle of the Trench' the medial arm vein of Sa`d bin Mu`ad [??] was injured and the Prophet pitched a tent in the mosque to look after him. There was another tent for Banu Ghaffar in the mosque and the blood started flowing from Sa`d's tent to the tent of Bani Ghaffar. They shouted, "O occupants of the tent! What is coming from you to us?" They found that Sa`d' wound was bleeding profusely and Sa`d died in his tent.