Avatarika
यथा असौ मृत्युः आत्मीयो धर्मो न भवति, तथा प्रदर्शनाय- अतः ऊर्ध्वं विमोक्षाय ब्रूहीत्येवं जनकेन पर्यनुयुक्तः याज्ञवल्क्यः तद्दिदर्शयिषया प्रवृत्ते-
In plain words
To show that death is not part of the self's own nature — Yājñavalkya, pressed by Janaka's request, 'From here on, speak only of liberation,' now turns to prove exactly that —
Close to the Sanskrit
In order to show how this death is not an inherent property of the self — Yājñavalkya, thus pressed by Janaka with 'From here on speak of liberation,' sets about demonstrating that very point —