Mbh 9.61.2c

Dost thou think I did not mark it when Arjuna (acting under thy advice) hinted it to Bhima? Having caused thousands of kings, who always fought fairly, to be slain through diverse kinds of unfair means, feelest thou no shame or no abhorrence for those acts? Day after day having caused a great carnage of heroic warriors, thou causedst the grandsire to be slain by placing Shikhandi to the fore! Having again caused an elephant of the name of Ashvatthama to be slain, O thou of wicked understanding, thou causedst the preceptor to lay aside his weapons. Thinkest thou that this is not known to me! While again that valiant hero was about to be slain this cruel Dhrishtadyumna, thou didst not dissuade the latter! The dart that had been begged (of Shakra as a boon) by Karna for the slaughter of Arjuna was baffled by thee through Ghatotkacha! Who is there that is more sinful than thou? Similarly, the mighty Bhurishrava, with one of his arms lopped off and while observant of the Praya vow, was caused to be slain by thee through the agency of the high-souled Satyaki. Karna had done a great feat for vanquishing Partha. Thou, however, causedst Aswasena, the son of that prince of snakes (Takshaka), to be baffled in achieving his purpose! When again the wheel of Karna's car sank in mire and Karna was afflicted with calamity and almost vanquished on that account, when, indeed, that foremost of men became anxious to liberate his wheel, thou causedst that Karna to be then slain! If ye had fought me and Karna and Bhishma and Drona by fair means, victory then, without doubt, would never have been yours. By adopting the most crooked and unrighteous of means thou hast caused many kings observant of the duties of their order and ourselves also to be slain!"