There, O Bharata, Arshtishena had in days of yore practised austerest of penances. There the great (Kshatriya) Muni Muni Vishvamitra became a Brahmana.
यत्र तप्तं तपो घोरमार्टिषेणेन भारत। ब्राह्मण्यं लब्धवांस्तत्र विश्वामित्रो महामुनिः॥