Khandogya-Upanishad: Second Prapathaka, Seventeenth Khanda
1. The hinkara is the earth, the prastava the sky, the udgitha heaven, the pratihara the regions, the nidhana the sea. These are the Sakvari Samans, as interwoven in the worlds.
2. He who thus knows the Sakvaris, as interwoven in the worlds, becomes possessed of the worlds, he reaches the full life, he lives long, becomes great with children and cattle, great by fame. His rule is, “Never complain of the worlds.”