Verse 16

शान्ते कर्तृत्वभोक्तृत्वे शान्तिरेवेह शिष्यते ।प्रौढिमभ्यागता सैव मुक्तिरित्युच्यते बुधैः

In plain words

When agency and enjoyership have both grown still, only peace remains here; and that very peace, come to its fullness, is called “mukti” by the wise.