The Great Epic of the Bhārata dynasty 6.3.41

6.3.41

pakvāpakveti subhṛśaṃ vāvāśyante vayāṃsi ca |
nilīyante dhvajāgreṣu kṣayāya pṛthivīkṣitām || 41 ||

All of them again are uttering frightful cries of pakka, pakka and are perching upon the tops of standards for the destruction of the kings. Vicious elephants, trembling all over, are running hither and thither, urinating and ejecting excreta. The horses are all melancholy, while the elephants are resorting to the water. Hearing all this, let that be done which is suitable, so that, O Bharata, the world may not be depopulated.'"