Rigveda 1.164.11
द्वाद॑शारं न॒हि तज्जरा॑य॒ वर्व॑र्ति च॒क्रं परि॒ द्यामृ॒तस्य॑ ।आ पु॒त्रा अ॑ग्ने मिथु॒नासो॒ अत्र॑ स॒प्त श॒तानि॑ विंश॒तिश्च॑ तस्थुः॥
dvādaśāraṃ nahi tajjarāya varvarti cakraṃ pari dyāmṛtasya |ā putrā agne mithunāso atra sapta śatāni viṃśatiśca tasthuḥ ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book