Valmiki Ramayana 7.22.43

तन्न खल्वेष ते सौम्य पात्यो रावणमूर्धनि ।नह्यस्मिन्पतिते कश्चिन्मुहूर्तमपि जीवति॥

tanna khalveṣa te saumya pātyo rāvaṇamūrdhani |nahyasminpatite kaścinmuhūrtamapi jīvati ||

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