Mbh 7.40.4

“Sanjaya said, ‘On the occasion of his insult to Draupadi, Jayadratha was vanquished by Bhimasena. From a keen sense of his humiliation, the king practised the severest of ascetic austerities, desirous of a boon. Restraining his senses from all objects dear to them, bearing hunger, thirst and heat, he reduced his body till his swollen veins became visible. Uttering the eternal words of the Veda, he paid his adoration to the god Mahadeva. That illustrious Deity, always inspired with compassion for his devotees, at last, became kind towards him. Indeed, Hara, appearing in a dream unto the ruler of the Sindhus, addressed him, saying “Solicit the boon thou desirest. I am gratified with thee, O Jayadratha! What dost thou desire?” Thus addressed by Mahadeva, Jayadratha, the ruler of the Sindhus, bowed down unto him and said with joined palms and restrained soul, “Alone, on a single car, I shall check in battle all the sons of Pandu, endued though they are with terrible energy and prowess.” Even this, O Bharata, was the boon he had solicited. Thus prayed to that foremost of the deities said unto Jayadratha, “O amiable one, I grant thee the boon. Except Dhananjaya, the son of Pritha, thou shalt in battle check the four other sons of Pandu.” “So be it,” said Jayadratha unto that Lord of the gods and then awoke, O monarch, from his slumber. In consequence of that boon which he had received and of the strength also of his celestial weapons, Jayadratha, single-handed, held in check the entire army of the Pandavas. The twang of his bow-string and the slaps of his palms inspired the hostile Kshatriyas with fear, filling thy troops, at the same time with delight. And the Kshatriyas (of the Kuru army), beholding that the burthen was taken up by the ruler of the Sindhus, rushed with loud shouts, O monarch, to that part of the field where Yudhishthira’s army was.’”