Valmiki Ramayana 7.99.4

अपश्यमानो वैदेहीं मेने शून्यमिदं जगत् ।शोकेन परमायस्तो न शान्तिं मनसा ऽगमत्॥

apaśyamāno vaidehīṃ mene śūnyamidaṃ jagat |śokena paramāyasto na śāntiṃ manasā 'gamat ||

Our plain-language meaning of this verse is waiting for scholar review.