The Great Epic of the Bhārata dynasty 2.68.35

2.68.35

caleddhi himavānsthānānniṣprabhaḥ syāddivākaraḥ |
śaityaṃ somātpraṇaśyeta matsatyaṃ vicaledyadi || 35 ||

"And Arjuna said,--'O Bhima, I will, as thou directest, slay in battle this Karna so malicious and jealous and harsh-speeched and vain. For doing what is agreeable to Bhima, Arjuna voweth that he will slay in battle with his arrows this Karna with all his followers. And I will send unto the regions of Yama also all those other kings that will from foolishness fight against me. The mountains of Himavat might be removed from where they are, the maker of the day lose his brightness, the moon his coldness, but this vow of mine will ever be cherished. And all this shall assuredly happen if on the fourteenth year from this, Duryodhana doth not, with proper respect, return us our kingdom.'"