Soham (Sanskrit) - Hamsa

Hamsa

Swami Muktananda - although teaching the traditional So on inhalation and ham on exhalation as a letter from 1968 to Franklin Jones reveals - later published a book teaching Ham on inhalation and sa on exhalation. This practice is described in several later books all referring to Muktananda.

The teaching of Ham on inhalation and sa on exhalation is allegedly alluded to in a text of Kaśmir Śaivism, the Vijnana Bhairava:

Air is exhaled with the sound SA and inhaled with the sound HAM. Then reciting of the mantra HAMSA is continuous —Vijnana Bhairava, 155a

However, this verse 155a is not found in the Vijnana Bhairava first published in 1918 in the Kashmir Series of Text and Studies but is quoted from a commentary by the Abhinavagupta disciple Kṣemarāja in his Shiva Sutra Vimarshini (commentary on the Shiva Sutras) in later editions of Vijnana Bhairava.