Mahabharata 8.63.74

8.63.74

śalya uvāca |
yadi karṇa raṇe hanyādadya tvāṃ śvetavāhanaḥ |
ubhāvekarathenāhaṃ hanyāṃ mādhavapāṇḍavau || 74 ||

Then the Suta's son, smilingly addressing Shalya, said, "If Partha by any means slays me in battle today, tell me truly, O friend, what thou wilt do after that." Shalya answered, saying, "If thou art slain, I myself will slay both Krishna and Dhananjaya." Once more the ruler of the Madras said, "If, O Karna, the white steeded Arjuna slays thee in battle today, I myself, on a single car, will slay both Madhava and Phalguna.'"