Śrāddha-kalpa: Amarakantaka–Tīrtha-Māhātmya and Akṣaya Pitṛ-Tarpaṇa
कौमारं च सरः पुण्यं नागभोगाभिरक्षितम् / कुमारतीर्थे स्नात्वा तु त्रिदिवं याति मानवः
kaumāraṃ ca saraḥ puṇyaṃ nāgabhogābhirakṣitam / kumāratīrthe snātvā tu tridivaṃ yāti mānavaḥ
The holy lake called Kaumāra is guarded by the coils of the nāgas; bathing at Kumāra-tīrtha, a person goes to Tridiva, the heavenly realm.