Mbh 14.81.1a

"'Arjuna said, "What business brought thee here, O daughter (-in-law) of Kuru's race, and what also is the cause of the arrival on the field of battle of her who is the mother of the ruler of Manipura? Dost thou entertain friendly motives towards this king, O daughter of a snake? O thou of restless glances, dost thou wish good to me too? I hope, O thou of ample hips, that neither I, nor this Vabhruvahana here, have, O beautiful lady, done any injury to thee unconsciously? Has Chitrangada of faultless limbs, descended from the race of Chitravahana, done thee any wrong?" Unto him, the daughter of the prince of snakes answered smilingly, "Thou hast not offended me, nor has Vabhruvahana done me any wrong; nor this prince's mother who is always obedient to me as a hand-maid. Listen, how all this has been brought about by me. Thou shouldst not be angry with me. Indeed, I seek to gratify thee by bending my head in reverence. O thou of Kuru's race, all this has been done by me for thy good, O puissant one. O mighty-armed Dhananjaya, hear all that I have done. In the great battle of the Bharata princes, thou hadst slain the royal son of Santanu by unrighteous ways. What I have done has expiated thy sin. Thou didst not overthrow Bhishma while battling with thee. He was engaged with Sikhandin. Relying on him as thy help, thou didst compass the overthrow of Santanu's son. If thou hadst died without having expiated thy sin, thou wouldst then have fallen without doubt into Hell in consequence of that sinful act of thine. Even this which thou hast got from thy son is the expiation of that sin. Formerly, O ruler of Earth, I heard this said by the Vasus while they were in the company of Ganga, O thou of great intelligence. After the fall of Santanu's son, those deities, viz., the Vasus, coming to the banks of Ganga, bathed in her waters, and calling the goddess of that stream, they uttered these terrible words having the sanction of Bhagirathi herself, viz.