Mbh 13.41.3

"'Bhishma continued, "Hearing these words of the high-souled Vipula, Sakra without saying anything, and overwhelmed with shame, made himself invisible. A moment after he had gone away, Devasarman of high ascetic merit, having accomplished the sacrifice he had intended to perform, came back to his own asylum. When his preceptor came back, Vipula, who had done an agreeable deed, gave unto him his wife of faultless beauty whom he had successfully protected against the machinations of Indra. Of tranquil soul and full of reverence for his preceptor, Vipula respectfully saluted him and stood in his presence with a fearless heart. After his preceptor had rested a while and when he was seated with his wife on the same seat, Vipula represented unto him everything that Sakra had done. Hearing these words of Vipula, that foremost of Munis, endued with great prowess, became highly gratified with him for his conduct and disposition, his penances, and his observances. Observing Vipula's conduct towards himself--his preceptor--and his devotion also, and noting his steadiness in virtue, the puissant Devasarman exclaimed, 'Excellent, excellent!' The righteous-souled Devasarman, receiving his virtuous disciple with a sincere welcome, honoured him with a boon. Indeed, Vipula, steady in virtue obtained from his preceptor the boon that he would never swerve or fall away from righteousness. Dismissed by his preceptor he left his abode and practised the most severe austerities. Devasarman also, of severe penances, with his spouse, began from that day to live in those solitary woods, perfectly fearless of him who had slain Vala and Vritra."'"