अथ परिचयावस्था तृतीयायां तु विज्ञेयो विहायो मर्दलध्वनिः । महाशून्यं तदा याति सर्वसिद्धिसमाश्रयम् ॥ ४.७४ ॥

atha paricayāvasthā tṛtīyāyāṃ tu vijñeyo vihāyo mardaladhvaniḥ । mahāśūnyaṃ tadā yāti sarvasiddhisamāśrayam ॥ 4.74 ॥

In the third stage, the sound of a drum is known to arise in the Sûnya between the eyebrows, and then the Vâyu goes to the mahâśûnya, which is the home of all the siddhîs.