Verse 15

एष साधो मनोनाशो नष्टं चेह मनो भवेत् ।चित्तनाशदशा चैषा जीवन्मुक्तस्य विद्यते

In plain words

This, good one, is the destruction of mind; and here the mind is destroyed. And this state of citta's destruction belongs to the jīvanmukta.