The Surya Upanishad (Sanskrit: सूर्य उपनिषत्), or Suryopanishad, is one of the minor
Upanishads of Hinduism, written in Sanskrit
language. ... In this Upanishad, Atharvangiras to whom the Atharvaveda is attributed, extols the virtues of Surya, the Sun god, calling him
the ultimate truth and reality Brahman.
Title means: The Sun God, the Supreme Light
Devanagari: सूर्य