When King Rion came into battle, he rushed in so hard that he sent them scattering, like it or not, and in the onslaught he bore King Bors to the ground with his horse on top of him. Then he raised his sword high to strike King Ban through the head, but Ban threw his shield forward and struck his horse with his spurs to ward off the blow, which still cut and sliced through as much of him as it reached.

Vulgate Merlin