Valmiki Ramayana 6.100.17

तयोः शरपथं प्राप्तो रावणो राजपुत्रयोः।स बभौ च यथा राहुः समीपे शशिसूर्ययोः॥

tayoḥ śarapathaṃ prāpto rāvaṇo rājaputrayoḥ |sa babhau ca yathā rāhuḥ samīpe śaśisūryayoḥ ||

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