Rigveda 1.86.10

गूह॑ता॒ गुह्यं॒ तमो॒ वि या॑त॒ विश्व॑म॒त्रिण॑म् ।ज्योति॑ष्कर्ता॒ यदु॒श्मसि॑॥

gūhatā guhyaṃ tamo vi yāta viśvamatriṇam |jyotiṣkartā yaduśmasi ||

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