2:17  

अविनाशि तु तद्विद्धि येन सर्वमिदं ततम् ।
विनाशमव्ययस्यास्य न कश्चित्कर्तुमर्हति ॥२- १७॥

awinaashi tu tadwiddhi yena sarwamidaM tatam ।

winaashamawyayasyaasya na kashchitkartumarhati ॥२- १७॥

Source: Automatic ITRANS Transliteration

Know that to be imperishable by which all this is pervaded.
Nothing is able to cause the destruction of this immutable.

Source: Milind S. Pandit

Know That, by which all this (universe) is pervaded, to be indestructible. No one can destroy the indestructible (Atma) .

Source: The Bhagavad-Gita: The Sacred Song

Know that which pervades the entire body is indestructible. No one is able to destroy the imperishable soul.

Source: Bhagavad Gita As It Is