Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 37
Sanskrit:
इति शक्रं विषीदन्तमाह वागशरीरिणी ।नायं शुष्कैरथो नार्द्रैर्वधमर्हति दानव: ॥ ३७ ॥
ITRANS:
iti śakraṁ viṣīdantamāha vāg aśarīriṇīnāyaṁ śuṣkair atho nārdrairvadham arhati dānavaḥ
Translation:
Śukadeva Gosvāmī continued: While the morose Indra was lamenting in this way, an ominous, unembodied voice said from the sky, “This demon Namuci is not to be annihilated by anything dry or moist.”