पूरके नूनमभ्यस्ते पूराद्गिरिघनस्थिते ।प्राणे प्रशान्तसंचारे प्राणस्पन्दो निरुद्ध्यते
In plain words
When pūraka has been well practiced, prāṇa grown dense and still as a mountain from its filling; when the movement of prāṇa has become fully stilled -- the vibration of prāṇa is restrained.