Bhishma said Listen truly in full, O son of Pritha, how, in days of yore, Vishvamitra acquired the status of a Brahmana, as also of a Brahmana Rishi!
भीष्म उवाच श्रूयतां पार्थ तत्त्वेन विश्वामित्रो यथा पुरा। ब्राह्मणत्वं गतस्तात ब्रह्मर्षित्वं तथैव च॥