Bhagavad Gita · 2.23

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

nainaṁ chhindanti śhastrāṇi nainaṁ dahati pāvakaḥ na chainaṁ kledayanty āpo na śhoṣhayati mārutaḥ

Weapons cannot cut the soul, fire cannot burn it, water cannot wet it, and wind cannot dry it.

— Bhagavad Gita 2.23

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)