hṛidi

सर्वद्वाराणि संयम्य मनो हृदि निरुध्य च

hṛidi — in the heart region

Holding all the gates closed, the mind confined in the heart, the breath established in the head, settled in the practice of yoga,

ज्योतिषामपि तज्ज्योतिस्तमसः परमुच्यते

hṛidi — within the heart

The light of lights, said to be beyond the dark; it is knowledge, what is to be known, and what knowledge reaches — seated in the heart of all.

सर्वस्य चाहं हृदि सन्निविष्टो मत्तः स्मृतिर्ज्ञानमपोहनं च

hṛidi — in the hearts

And I am seated in the hearts of all. From me come memory and knowledge, and their loss. I am what is to be known through all the Vedas; I am the maker of their meaning, and the knower of them.