Bhagavad Gītā Chapter Ten verse 20

aham ātmā guḍākeśa sarvabhūtāśayasthitaḥ |
aham ādiśca madhyaṃ ca bhūtānām anta eva ca ||

aham - Iātman - essence; the highest personal principle of lifesarva - allbhūta - element; living beingāśaya - seed, deposit; resting placesthiti - staying, maintenancemadhya - moderatenessca - andanta - end (from ... to)eva - thus

Commentaries and Reflections

T Krishnamacharya:

Ātma – That which nourishes.