Bhagavad Gita 2.23

Weapons cannot cleave it, fire cannot burn it, water cannot drench it, and wind cannot dry it.

नैनं छिन्दन्ति शस्त्राणि नैनं दहति पावकः।
न चैनं क्लेदयन्त्यापो न शोषयति मारुतः॥

nainaṃ chindanti śastrāṇi nainaṃ dahati pāvakaḥ|
na cainaṃ kledayantyāpo na śoṣayati mārutaḥ||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).