Mbh 7.199.3b

By righteousness alone, O fool, one cannot vanquish his enemies. Listen now to the unrighteous acts of the Kurus also. Pandu’s son, Yudhishthira was some time back unrighteously deceived by them. O Satyaki, Draupadi also was persecuted by them unrighteously. The Pandavas, with Krishna in their company, were also exiled and they were robbed of their all, O fool, most unrighteously. By an act of unrighteousness, again, has the ruler of the Madras been withdrawn from us by the enemy. By an act of unrighteousness also was the son of Subhadra slain. On this side, it was by an act of unrighteousness that Bhishma, the Kuru grandsire, was slain. Bhurisravas, too, was, by an act of unrighteousness, slain by thee that art so acquainted with righteousness. Even thus have the enemy, as also the Pandavas, acted in this battle. Possessed of courage and acquainted with morality, all of them, O Satwata, have acted thus, for gaining victory. High morality is difficult of ascertainment. Similarly, immorality also can with difficulty be comprehended. Fight now with the Kauravas, without returning to the home of thy fathers.”’