ŚVETĀŚVATARA UPANISHAD · 1.12

एतज् ज्ञेयं नित्यम् एवात्मसंस्थं नातः परं वेदितव्यं हि किंचित् ।
भोक्ता भोग्यं प्रेरितारं च मत्वा सर्वं प्रोक्तं त्रिविधं ब्रह्मम् एतत् ॥

etaj jñeyaṃ nityam evātmasaṃsthaṃ nātaḥ paraṃ veditavyaṃ hi kiṃcit ।
bhoktā bhogyaṃ preritāraṃ ca matvā sarvaṃ proktaṃ trividhaṃ brahmam etat ॥

This, which rests eternally within the self, should be known; and beyond this not anything has to be known. By knowing the enjoyer, the enjoyed, and the ruler, everything has been declared to be threefold, and this is Brahman.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)