Mahabharata 3.243.18

3.243.18

pāṇḍavāśca maheṣvāsā dūtavākyapracoditāḥ |
cintayantastamevārthaṃ nālabhanta sukhaṃ kvacit || 18 ||

"Meanwhile those mighty bowmen, the Pandavas, excited by the words the messenger had spoken, became anxious, and they did not (from that time)

experience the least happiness. Intelligence, further, O foremost of kings, had been brought by spies regarding the vow of the Suta's son to slay Vijaya. Hearing this, O lord of men, Dharma's son became exceedingly anxious. And considering Karna of the impenetrable mail to be of wonderful prowess, and remembering all their woes, he knew no peace. And that high-souled one filled with anxiety, made up his mind to abandon the woods about Dwaitavana abounding with ferocious animals.