भूयोभूयश्चिराभ्यासाज्जिह्वाप्रान्तेन तालुनि ।घण्टिका स्पृश्यते प्राणो येनोच्चैर्निवहत्यलम्
In plain words
Again and again, through long practice, with the tip of the tongue the ghaṇṭikā on the palate is touched -- by which prāṇa comes to flow, in full measure, strongly upward.