Mbh 1.236.5

“Vaisampayana continued, ‘Then Partha asked from Indra all his weapons. At this Sakra of great splendour, having fixed the time for giving them, said, ‘When the illustrious Madhava becomes pleased with thee, then, O son of Pandu, I will give thee all my weapons! O prince of Kuru’s race, I shall know when the time cometh. Even for thy austere asceticism I will give thee all my weapons of fire and all my Vayavya weapons, and thou also wilt accept them all of me.’ Then Vasudeva asked that his friendship with Arjuna might be eternal. The chief of the celestials granted unto the intelligent Krishna the boon he desired. And having granted these boons unto Krishna and Arjuna, the lord of the Maruts, accompanied by the celestials, ascended to heaven, having also spoken to Hutasana (one whose food is sacrificial butter). Agni also, having burnt that forest with its animals and birds for five and ten days, became gratified and ceased to burn. Having eaten flesh in abundance and drunk fat and blood, he became highly gratified, and addressing Achyuta and Arjuna said, ‘I have been gratified by you two tigers among men. At my command, ye heroes, ye shall be competent to go wheresoever ye choose!’ Thus addressed by the illustrious Agni, Arjuna and Vasudeva and the Danava Maya also--these three,--having wandered a little at last sat themselves down on the delightful banks of a river.’”