Rigveda 10.190.1

माधुच्छन्दसोऽघमर्षणः। भाववृत्तम्। अनुष्टुप्। · mādhucchandaso'ghamarṣaṇaḥ | bhāvavṛttam | anuṣṭup |

ऋ॒तं च॑ स॒त्यं चा॒भी॑द्धा॒त्तप॒सोऽध्य॑जायत ।ततो॒ रात्र्य॑जायत॒ तत॑: समु॒द्रो अ॑र्ण॒वः॥

ṛtaṃ ca satyaṃ cābhīddhāttapaso'dhyajāyata |tato rātryajāyata tata: samudro arṇavaḥ ||

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