Basin on pedestal with relief representation

Two mighty snakes twine around the branches of a tree. One of them is about to eat a frog, the other coils around a shallow basin and holds the feet of a naked, bearded man in its mouth. The man hangs upside down, and a third snake grasps the top of his head with its fangs, while two lionesses gnaw at his bent elbows. Between this group and the tree a lion stands over a prone man on the lowest row of stones. The man attempts to fend the beast off with his left hand, which disappears into its mouth.