Muhammad’s battle wounds proved his humanity to doubting Christians

Evidence

The physical detail of Muhammad’s wounds at the Muslim disaster at Uhud were closely studied, because they corroborated Muhammad’s ordinary humanity: the teeth on the right side knocked out, the upper lip split, the cheek gashed, these were seen to constitute a record of convincing evidence. Muhammad was protected by his companion Talha, who lost a finger in doing so. No angel ministered to their wounds. — Norman Daniel, Islam and the West, 537