Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 19

Sanskrit:

अहो मित्राणि गदत सत्त्वकूटं पुर: स्थितम् ।अस्मत्सङ्ग्रसनव्यात्तव्यालतुण्डायते न वा ॥ १९ ॥

ITRANS:

aho mitrāṇi gadatasattva-kūṭaṁ puraḥ sthitamasmat-saṅgrasana-vyātta-vyāla-tuṇḍāyate na vā

Translation:

The boys said: Dear friends, is this creature dead, or is it actually a living python with its mouth spread wide just to swallow us all? Kindly clear up this doubt.

Purport:

The friends began to discuss among themselves the reality of the wonderful creature laying before them. Was it dead, or was it actually a living python trying to swallow them up?