Kaushika's son Gadhi begot a son named Vishvamitra. Possessed of every attribute of a Brahmana, that son though a Kshatriya by birth was equal to a Brahmana.
विश्वामित्रं च दायादं गाधिः कुशिकनन्दनः। यः प्राप ब्रह्मसमितं विश्वैर्ब्रह्मगुणैर्युतम्॥