Indian Sources
In the Atharvaveda Veda
“whosoever is driven by the Breath of Life, he will be reborn”
In the Taittirya Upanishad :
"He perceived that Breath is Brahman, for from Breath these beings are born; by breath, when born, they live; into the Breath they enter at their death."
Atman, the Breath of life, or source of the Breath of life :
The Atman is the immortal principle of life, that is totally equal to Brahman (God almighty), but then reflected in the heart of man. In scientific works one usually translates Atman as ‘the Self'. Others translate Atman as ‘the mind' or ‘the intellect'. S. Dasgupta in ‘A History of Indian Philosophy', p. I, 26: “the word atman ...... is generally used to mean ‘vital breath'.” Dasgupta, however, generally uses the translation Self for atman. Etymologically, the German word ATMEN (to breathe) is directly related to the Sanskrit ATMAN. Sanskrit is one of the oldest languages of the family of languages called INDO-EUROPEAN or INDO-GERMAN, hence the relationships.
Jnaneshwar
Jnaneshwar (13th century), in his commentary on the Bhagavat Ghita, the ‘Bhavartha Dipika', translated by MR. Yardi, 1991, where Jnaheshwar describes in detail an evolved wind-like manifestation of Kundalini (the primordial energy that resides in the sacrum bone):
“... then the Kundalini gives up her fiery complexion, and remains in the gaseous state (p. 128)” and “although she is called Shakti (force), she is still in the form of gas ... (p. 129)” and “... now she is not known as Kundalini, but takes on the name ‘windy' (maruta) ... breaking open the end of the sushumna nadi, she enters the cidakasha of Brahmarandra ... (p. 130.)”
[sushumna= channel in the spine, brahmarandra= fontanel area on the skull or limbic area in the brain]