DIOMEDES, king of Thrace, owned horses which fed on human flesh. As his eighth labor, Hercules killed Diomedes and threw his body to the horses (Met IX.194-196; OM IX.1-872).
Lady Philosophy rehearses the labors of Hercules, Bo 4, Metr 7.28-62. Chaucer adds a gloss that the horses of Diomedes devoured him. [Busirus: Ercules]