Nadabindu Upanishad

The Nadabindu Upanishad (Sanskrit: नादबिन्दु उपनिषत्, Nādabindu Upaniṣat) is a Sanskrit text that is part of the Rigveda. It is one of the Yoga Upanishads and focuses on the practice of Nādānusandhāna (concentration on the internal sound).

Selected Verses

The Bird of Om

• Verses 1-4: The symbolic form of the Pranava (Om) as a bird and the various lokas.

Prarabdha and Jñāna

• Verse 21: Living with Prarabdha.
• Verse 22: Tattvajñāna and the perception of Prarabdha.
• Verse 26: The illusion of the world.
• Verse 30: The dawning of the Self at the end of Prarabdha.

Concentration on Nāda

• Verse 41: Absolute concentration on sound.
• Verse 44: Controlling the mind through Nāda.
• Verse 48: Transition to the Unmanī state.
• Verse 49: Absorption into the Akṣara.

Spiritual Sight and Stillness

• Verse 56: The state of internal sound of Brahma-Pranava.

Reference: Upanishads