Verse 16

Glance

यावदित्थमवस्थैषा प्रणवस्यापरे क्रमे ।बभूव न हठादेव हठयोगो हि दुःखदः

In plain words

As this state thus came about in the next stage of the praṇava — not through force; for haṭhayoga indeed brings suffering.