Bhagavad Gita 13.33

यथा सर्वगतं सौक्ष्म्यादाकाशं नोपलिप्यते।सर्वत्रावस्थितो देहे तथाऽऽत्मा नोपलिप्यते ॥१३.३३॥

yathā sarvagataṃ saukṣmyādākāśaṃ nopalipyatesarvatrāvasthito dehe tathā’’tmā nopalipyate

As the all-pervading ether is not tainted, due to its subtlety, so the Self seated everywhere in the body is not tainted either.

गीता