Verse 30

झटित्येव यदुद्भूतं ज्ञानं तस्मिन्दृढाश्रिते ।असंश्लिष्टविकल्पांशे प्राणस्पन्दो निरुद्ध्यते

In plain words

When that jñāna which springs up all at once is firmly held to -- jñāna to which no portion of vikalpa clings -- the vibration of prāṇa is restrained.