Bhagavad Gītā Chapter Ten verse 20

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

aham - I; I amātman - essence; the highest personal principle of life; the individual soul, selfsarva - allbhūta - element; living beingāśaya - seed, deposit; resting placesthiti - staying or remaining or being in any state or condition; maintenance of life;madhya - moderateness; middle, central, being in the middle or centre; Intervening, intermediate; standing between two, impartial, neutralca - andanta - end (from ... to)eva - thus

Commentaries and Reflections

Commentary by T Krishnamacharya:

Ātma – That which nourishes.