Valmiki Ramayana 7.22.44

यदि ह्यन्मिन्निपतिते न म्रियेतैष राक्षसः ।म्रियते वा दशग्रीवस्तदाप्युभयतो ऽनृतम्॥

yadi hyanminnipatite na mriyetaiṣa rākṣasaḥ |mriyate vā daśagrīvastadāpyubhayato 'nṛtam ||

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