Verse 22

आत्मतत्त्वावबोधेन हीना देहादिवस्तुजा ।भूयः संसारसक्तिर्या दृढा वन्ध्येति कथ्यते

In plain words

That attachment to saṃsāra which, devoid of the awakening to the truth of the Self, is born of things like the body, and grows ever firmer -- that is called the barren kind.