Bhagavad Gita Chapter 10.15
svayam evātmanātmānaḿ
vettha tvaḿ puruṣottama
bhūta-bhāvana bhūteśa
deva-deva jagat-pate
Translation
Indeed, You alone know Yourself by Your own internal potency, O Supreme Person, origin of all, Lord of all beings, God of gods, Lord of the universe!