Khandogya-Upanishad: Second Prapathaka, Twentieth Khanda
1. The hinkara is fire, the prastiva air, the udgitha the sun, the pratihira the stars, the nidhana the moon. That is the Ragana Saman, as interwoven in the deities.
2. He who thus knows the Ragana, as interwoven in the deities, obtains the same world, the same happiness, the same company as the gods, he reaches the full life, he lives long, becomes great with children and cattle, great by fame. His rule is, “Do not speak evil of the Brahmanas.”