The Upanishads - Mandhata Global

smelling; for it is unsmitten by evil. Whatever a person
eats or drinks with it (the principal vital breath) supports
the other pranas. That is why they depart when, at the
time death, it no longer supports them by eating and
drinking. It opens the mouth at the time of death as if the
dying man wished to eat.
10-13
Angira meditated on the Udgitha as the principal prana.
people call it (i.e. the prana) Angiras, because it is the
essence (rasa) of the limbs (anga).
Brihaspati meditated on the Udgitha as the principal
prana. People call it (the prana) Brihaspati, because
speech is great (brihat) and it is the lord (pati) of speech.
Ayasya meditated on the Udgitha as the principal prana.
People call it (the prana) as Ayasya; because it comes
(ayate) from the mouth (asya).
Vaka, the son of Dalbhya, knew it (the prana); he
became the udgatri priest of the sacrificers dwelling in
the Naimisha forest.
By singing the Udgitha he fulfilled all their desires.
14
He who knows this as described above and meditates
upon the imperishable Udgitha (Om) obtains all his
desires by singing the Udgitha. So much for the Udgitha
as meditates on with reference to the body.
410