Nainam Chindanti Shastraniनैनं छिन्दन्ति शस्त्राणि

Bhagavad Gita 2.23 teaches a devotional principle from Krishna’s dialogue with Arjuna.

Bhagavad Gita 2.23
नैनं छिन्दन्ति शस्त्राणि नैनं दहति पावकः । न चैनं क्लेदयन्त्यापो न शोषयति मारुतः ॥
भावार्थ
शस्त्र आत्मा को काट नहीं सकते, अग्नि उसे जला नहीं सकती, जल उसे भिगो नहीं सकता और वायु उसे सुखा नहीं सकती।
Meaning
No weapon can cut the self, fire cannot burn it, water cannot wet it, and wind cannot dry it.

Source: Bhagavad Gita 2 Sanskrit checked against SanskritDocuments, Bhagavad Gita 2.14–2.71: https://www.sanskritdocuments.org/doc_giitaa/bhagvadnew.html ; meanings checked against IIT Kanpur Gita Supersite and Vedabase chapter 2: https://www.gitasupersite.iitk.ac.in/srimad?field_chapter_value=2&field_nsutra_value=23&language=dv ; https://vedabase.net/bg/2/index.htm