Rigveda 7.81.1

मैत्रावरुणिर्वसिष्ठ:। उषस: ।प्रगाथ:=(विषमा बृहती, समा सतोबृहती )। · maitrāvaruṇirvasiṣṭha: | uṣasa: |pragātha:=(viṣamā bṛhatī, samā satobṛhatī ) |

प्रत्यु॑ अदर्श्याय॒त्यु१च्छन्ती॑ दुहि॒ता दि॒वः ।अपो॒ महि॑ व्ययति॒ चक्ष॑से॒ तमो॒ ज्योति॑ष्कृणोति सू॒नरी॑॥

pratyu adarśyāyatyu1cchantī duhitā divaḥ |apo mahi vyayati cakṣase tamo jyotiṣkṛṇoti sūnarī ||

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