Fragment of a Lid (?) with a Hunting Scene

The image shows a gray stone carving. The carving is rectangular but the bottom right corner is missing. A border of small dots encircles the carving. The top border features leaf-like patterns, and the left border has a floral design. The main scene depicts two men on horseback hunting. The man on the left rides a horse with a long tail and holds a bow. The horse rears up with front legs bent. The man on the right rides a horse with a short tail, holds a spear, and appears to be thrusting it into a lion that runs in front of the horse. The lion has its mouth open. A row of small dots borders the bottom of the scene.