Bhagavad Gita Chapter 13
Powerful Cognition
The soul is free from all entanglements. It is eternal and transcendental.
yathā sarvagataṁ saukṣmyād ākāśaṁ nopalipyate sarvatrāvasthito dehe tathātmā nopalipyate
The sky, due to its subtle nature, does not mix with anything, although it is all-pervading. Similarly, the soul, situated in Brahman, does not mix with the body, though situated in that body