The works of Ādi Śaṅkarācārya

Sanatsujātīyam

p. 308

p. 308

आत्माहमस्मि सर्वस्य यच्च नास्ति यदस्ति च ॥

In plain words

I am the Self of everything — of what is not, and of what is.

Close to the Sanskrit

I am the Self of all — and of that which is not, and of that which is.