Taittriya Upanishad, Chapter 3, Bhrigu Valli, Section 1, Verse 1

Taittriya Upanishad,
Chapter 3, Bhrigu Valli, Section 1, Verse 1: Bhrigu approaches his father Varuna with reverence and asks ‘भगवान, teach me Brahman’ ( he wants to experience Brahman himself). Varuna says Food, Pranas, (प्राण), eyes, ears, mind and speech are Brahman. (meaning Brahman is the substratum of this entire phenomenal world). 🙏