Chapter 2 · The Yoga of Knowledge · Krishna said
Bhagavad Gita 2.23 — Nothing can harm the soul
नैनं छिन्दन्ति शस्त्राणि नैनं दहति पावकः। न चैनं क्लेदयन्त्यापो न शोषयति मारुतः ॥
nainaṃ chindanti śastrāṇi nainaṃ dahati pāvakaḥ | na cainaṃ kledayantyāpo na śoṣayati mārutaḥ ||
Meaning
Weapons cannot cut the soul, fire cannot burn it, water cannot wet it and wind cannot dry it.