It is narrated from Hazrat Aisha (may Allah be pleased with her) that on the day of the Battle of the Trench, an arrow struck a vein in the arm of Hazrat Saad bin Muadh (may Allah be pleased with him), which was shot by a man from the Quraysh named "Hibban bin Arqah." So the Prophet (peace and blessings be upon him) had his tent pitched in the Prophet's Mosque so that he could visit him closely.