Shloka 4.41.10
दक्षिणदिशि सीतान्वेषण-आदेशः (Commissioning the Southern Search for Sītā)
सहस्रशिरसं विन्ध्यं नानाद्रुमलतायुतम्।नर्मदां च नदीं रम्यां महोरगनिषेविताम्।।4.41.8।।ततो गोदावरीं रम्यां कृष्णवेणीं महानदीम्।वरदां च महाभागां महोरगनिषेविताम्।।4.41.9।।मेखलामुत्कलां चैव दशार्णनगराण्यपि।आश्ववन्तीमवन्तीं च सर्वामेवानुपश्यत।।4.41.10।।
sahasraśirasaṃ vindhyaṃ nānādrumalatāyutam |
narmadāṃ ca nadīṃ ramyāṃ mahōraganiṣevitām || 4.41.8 ||
tato godāvarīṃ ramyāṃ kṛṣṇaveṇīṃ mahānadīm |
varadāṃ ca mahābhāgāṃ mahōraganiṣevitām || 4.41.9 ||
mekhalām utkalāṃ caiva daśārṇanagarāṇy api |
āśvavantīm avantīṃ ca sarvām evānupaśyata || 4.41.10 ||
Survey and search the Vindhya with its thousand peaks, rich in many trees and creepers, and the lovely river Narmadā, frequented by great serpents. Then proceed to the delightful Godāvarī, to Kṛṣṇaveṇī, to the great river Mahānadī, and also to Varadā and Mahābhāgā—regions haunted by mighty serpents. Observe and search Mekhalā and Utkalā, the towns of Daśārṇa, and also Āśvavantī and Avantī—indeed, search all of them thoroughly.
'Search for Sita all over Vindhya of a thousand peaks filled with several trees and creepers, and along the river Narmada. Then proceed to Godavari, lovely Krishnaveni, Mahanadi, Varada and Mahabhaga inhabited by terrific serpents.You may search Mekhala, Utkala and Dasarna cities, Asvavanti and Avanti countries also.
Dharma as meticulous duty: the righteous mission requires exhaustive coverage of terrain, not abandoning effort due to hardship or fear.
Sugrīva (in the southern dispatch) lists major mountains, rivers, and regions to be surveyed while searching for Sītā.
Perseverance and courage—continuing the search even through dangerous serpent-haunted regions.