PRAŚNA UPANISHAD · 5.2
तस्मै स होवाच । एतद्वै सत्यकाम परं चापरं च ब्रह्म यदोङ्कारः ।
तस्माद्विद्वानेतेनैवायतनेनैकतरमन्वेति ॥ ५.२॥
tasmai sa hovāca । etadvai satyakāma paraṃ cāparaṃ ca brahma yadoṅkāraḥ ।
tasmādvidvānetenaivāyatanenaikataramanveti ॥ 5.2॥
To him answered the Rishi Pippalada: “This imperishable Word that is OM, O Satyakama, is the Higher Brahman and also the Lower. Therefore the wise man by making his home in the Word, winneth to one of these.
Sri Aurobindo · CWSA 18, p. 188