Rigveda 1.46.6

या न॒: पीप॑रदश्विना॒ ज्योति॑ष्मती॒ तम॑स्ति॒रः ।ताम॒स्मे रा॑साथा॒मिष॑म्॥

yā na: pīparadaśvinā jyotiṣmatī tamastiraḥ |tāmasme rāsāthāmiṣam ||

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