Then Yvain charged at Morholt with all the speed he could get from the horse and struck him so hard on his unshielded chest that he splintered his lance, but he did him no other harm. Morholt, sparing Yvain nothing, struck him so hard
that he drove the sharp iron through his shield and hauberk into his left side and gave him a large wound, but
it was not so deep that it could not be healed. He skewered him well and bore him from his horse to the ground, so that the point of his helmet struck into the sand, and Morholt passed by, never looking at him, and left him lying on the ground, so battered by the fall that it seemed to him he had broken all his bones.

Post-Vulgate Merlin