Valmiki Ramayana 5.39.41

मम पृष्ठगतौ तौ च चन्द्रसूर्याविवोदितौ ।त्वत्सकाशं महासत्त्वौ नृसिंहावागमिष्यतः॥

mama pṛṣṭhagatau tau ca candrasūryāvivoditau |tvatsakāśaṃ mahāsattvau nṛsiṃhāvāgamiṣyataḥ ||

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