Verse 13

न विशश्राम चेतोऽस्य भोगरोगानुरञ्जने ।मुक्ताफलमसंश्लिष्टं मुक्ताफल इवामले

In plain words

His mind found no rest in being tinged by the disease of enjoyment — as a pearl, finding nothing to cling to, does not settle upon a flawless pearl.