Brahma Vidya Upanishad is a minor
Upanishad that belongs to the Krishna-Yajurveda. This Upanishad records that the syllable OM is the
Brahman. It describes the body or sariram of the sound OM, the location or sthanam of the sound OM, the terminus or kala of the sound OM, the vanishing, fading away or laya of the sound OM.
The Brahma Vidya Upanishad proclaims the Brahman lore, which is the highest knowledge.