Sage · All traditions · Pan-India
Vishvamitra
The royal sage and rival of Vasishtha. In the Shalya Parva he orders the river Sarasvati to bring Vasishtha to him to be killed, and curses her to run with blood for a year when she carries Vasishtha away again.
Sources: The Mahabharata, tr. K. M. Ganguli (1883-96), sections read for the Vedic layer · see Vishvamitra's web