Mbh 7.37.2b

Indeed, Duryodhana said unto Karna and king Valhika and Duhsasana and the ruler of the Madras and the many other mighty car-warriors of his army, these words, “The preceptor of the entire order of the Kshatriyas,--he that is the foremost of all conversant with Brahma, doth not, from stupefaction, wish to slay this son of Arjuna. None can, in battle, escape the preceptor with life, not even the Destroyer himself, if the latter advanceth against the preceptor as a foe. What, O friend, shall we say then of any mortal? I say this truly. This one is the son of Arjuna, and Arjuna is the preceptor’s disciple. It is for this that the preceptor protecteth this youth. Disciples and sons and their sons are always dear to the virtuous people. Protected by Drona, the youthful son of Arjuna regardeth himself valourous. He is only a fool entertaining a high opinion of himself. Crush him, therefore, without delay.” Thus addressed by the Kuru king, those warriors, O monarch, excited with rage and desirous of slaying their foe, rushed, in the very sight of Drona at the son of Subhadra that daughter of the Satwata race. Duhsasana, in particular, that tiger among the Kurus, hearing those words of Duryodhana, answered the latter, saying, “O monarch, I tell thee that even I will slay this one in the very sight of the Pandavas and before the eyes of the Panchalas. I shall certainly devour the son of Subhadra today, like Rahu swallowing Surya (sun).” And once more addressing the Kuru king loudly, Duhsasana said, “Hearing that Subhadra’s son hath been slain by me, the two Krishnas, who are exceedingly vain, will without doubt, go to the region of the departed spirits, leaving this world of men. Hearing then of the death of the two Krishnas, it is evident that the other sons born of Pandu’s wives, with all their friends, will, in course of a single day, cast away their lives from despair. It is evident, therefore, that this one foe of thine being slain, all thy foes will be slain.