Lycurgus in Harpers Dictionary of Classical Antiquities

A king of Thrace, who, when Bacchus was passing through his country, assailed him so furiously that the god was obliged to take refuge with Thetis. Bacchus avenged himself by driving Lycurgus mad, and the latter thereupon killed his own son Dryas with a blow of an axe, taking him for a vine-branch. The land became, in consequence, sterile; and his subjects, having been informed by an oracle that it would not regain its fertility until the monarch was put to death, bound Lycurgus, and left him on Mount Pangaeus, where he was destroyed by wild horses (Apollod. iii.5.1).