Mbh 14.80.3a

"Vaisampayana continued, 'When the king of Manipura, that chastiser of foes, afflicted with grief, along with his mother, sat down to starve himself to death, Ulupi then thought of the gem that has the virtue of reviving a dead man. The gem, the great refuge of the snakes, thus thought of, came there. The daughter of the prince of snakes taking it up, uttered these words that highly gladdened the combatants standing on the field. "Rise up, O son. Do not grieve. Jishnu has not been vanquished by thee. This hero is incapable of being vanquished by men as also by the deities with Vasava himself at their head. I have exhibited this illusion, deceiving your senses, for the benefit of this foremost of men, viz., thy illustrious sire. O thou of Kuru's race, desirous of ascertaining the prowess of thyself, his son, this slayer of hostile heroes, O king, came here for battling with thee. It was for that reason, O son, that thou wert urged by me to do battle. O puissant king, O son, do not suspect that thou hast committed any, even the least, fault, by accepting his challenge. He is a Rishi, of a mighty soul, eternal and indestructible. O dear son, Sakra himself is incapable of vanquishing him in battle. This celestial gem has been brought by me, O king. It always revives the snakes as often as they die. O puissant king, do thou place this gem on the breast of thy sire. Thou shalt then see the son of Pandu revived." Thus addressed, the prince who had committed no sin, moved by affection for his sire, then placed that gem on the breast of Pritha's son of immeasurable energy. After the gem had been placed on his breast, the heroic and puissant Jishnu became revived. Opening his red eyes he rose up like one who had slept long. Beholding his sire, the high-souled hero of great energy, restored to consciousness and quite at his ease, Vabhruvahana worshipped him with reverence.