Mbh 13.30.4a

"'Bhishma continued, "Unto him who pleaded so piteously, Bharadwaja of great energy said, 'Do not fear! Do not fear! O son of Sudeva, let thy fears be dispelled. I shall perform a sacrifice, O monarch, in order that thou mayst have a son through whom thou shalt be able to smite thousands upon thousands of Vitahavya's party.' After this, the Rishi performed a sacrifice with the object of bestowing a son on Divodasa. As the result thereof, unto Divodasa was born a son named Pratarddana. Immediately on his birth he grew up like a boy of full three and ten years and quickly mastered the entire Vedas and the whole of arms. Aided by his Yoga powers, Bharadwaja of great intelligence had entered into the prince. Indeed, collecting all the energy that occurs in the object of the universe, Bharadwaja put them together in the body of prince Pratarddana. Put on shining mail on his person and armed with the bow, Pratarddana, his praises sung by bards and the celestial Rishis, shone resplendent like the risen star of day. Mounted on his car and with the scimitar tied to his belt, he shone like a blazing fire. With scimitar and shield and whirling his shield as he went, he proceeded to the presence of his sire. Beholding the prince, the son of Sudeva, viz., king Divodasa, became filled with joy. Indeed, the old king thought the sons of his enemy Vitahavya as already slain. Divodasa then installed his son Pratarddana as Yuvaraja, and regarding himself crowned with success became exceedingly happy. After this, the old king commanded that chastiser of foes, viz., prince Pratarddana to march against the sons of Vitahavya and slay them in battle. Endued with great powers, Pratarddana, that subjugator of hostile cities speedily crossed Ganga on his car and proceeded against the city of the Vitahavyas. Hearing the clatter own cars that looked like fortified citadels and that were capable of destroying hostile vehicles, issued out of their city.