Khandogya-Upanishad: Third Prapathaka, Third Khanda
1. The western rays of the sun are the honeycells behind. The Saman verses are the bees, the Sama-veda sacrifice is the flower, the water is the nectar.
2. Those very Saman verses (as bees) brooded over the Sama-veda sacrifice; and from it, thus brooded on, sprang as its (nectar) essence, fame, glory of countenance, vigour, strength, and health.
3. That flowed forth and went towards the sun. And that forms what we call the dark (krishna) light of the sun.