Vijnana Bhairava Tantra · Dharana 16 · Verse 39
AUM into the silence after
In a quiet room, chant AUM slowly, or any single syllable that is alive for you. The practice is not the note. The practice is the silence after the last vibration has died away. Stay in that silence until the next chant is needed, or until it is not.
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Sound the sacred syllable AUM in full, and rest in the void at the end of its long resonance. Through that void, the supreme power, one enters the void, O Bhairavi.