One verse

Srimad Bhagavatam 4.23.14

4.23.14

सम्पीड्य पायुं पार्ष्णिभ्यां वायुमुत्सारयञ्छनै: । नाभ्यां कोष्ठेष्ववस्थाप्य हृदुर:कण्ठशीर्षणि ॥ १४ ॥

sampidya payum parsnibhyam vayum utsarayan chanaih nabhyam kosthesv avasthapya hrd-urah-kantha-sirsani

sampidya
by blocking
payum
the door of the anus
parsnibhyam
by the calves
vayum
the air which goes up
utsarayan
pushing upward
sanaih
gradually
nabhyam
by the navel
kosthesu
in the heart and in the throat
avasthapya
fixing
hrt
in the heart
urah
upward
kantha
throat
sirsani
between the two eyebrows.

When Maharaja Prthu practiced a particular yogic sitting posture, he blocked the doors of his anus with his ankles, pressed his right and left calves and gradually raised his life air upward, passing it on to the circle of his navel, up to his heart and throat, and finally pushed it upward to the central position between his two eyebrows.