Bhagavad Gita 10.20

अहमात्मा गुडाकेश सर्वभूताशयस्थितः।अहमादिश्च मध्यं च भूतानामन्त एव च॥

ahamātmā guḍākeśa sarvabhūtāśayasthitaḥ |ahamādiśca madhyaṃ ca bhūtānāmanta eva ca ||

I am the Self, O Gudakesa, seated in the hearts of all beings; I am the beginning, the middle, and the end of all beings.

O Arjuna! I am the Self, seated in the hearts of all beings; I am the beginning, the life, and the end of them all.

Our plain-language meaning of this verse is waiting for scholar review.