Bhagavad Gita: Chapter 2, Verse 24

अच्छेद्योऽयमदाह्योऽयमक्ल‍ेद्योऽशोष्य एव च ।
नित्यः सर्वगतः स्थाणुरचलोऽयं सनातनः ॥ २-२४ ॥

acchedyo ’yam adāhyo ’yam akledyo ’śoṣya eva ca
nityaḥ sarva-gataḥ sthāṇur acalo ’yaṁ sanātanaḥ 2.24

This soul is uncuttable and insoluble, cannot be moistened, cannot be burnt nor dried. It is eternal, omnipresent, stationary, unmoving, and unchangeable.