Vijnana Bhairava Tantra · Dharana 0 · Verse 155
Hamsa on the breath
The book offers this after the numbered methods. The breath already makes a sound: a soft sa as it leaves, a soft ha as it enters. Do not produce the sound. Hear what is already there. You can sit with it, or keep a thread of attention on it through the day. The practice is the hearing.
Older line
With the sound sa the breath goes out, and with the sound ha it comes back in. So every living being repeats this mantra, hamsa, hamsa, without ceasing: twenty-one thousand six hundred times in a day and a night. This is the Goddess’s own recitation, easy for anyone, and hard only for the dull.