Rigveda 3.5.4

मि॒त्रो अ॒ग्निर्भ॑वति॒ यत् समि॑द्धो मि॒त्रो होता॒ वरु॑णो जा॒तवे॑दाः ।मि॒त्रो अ॑ध्व॒र्युरि॑षि॒रो दमू॑ना मि॒त्रः सिन्धू॑नामु॒त पर्व॑तानाम्॥

mitro agnirbhavati yat samiddho mitro hotā varuṇo jātavedāḥ |mitro adhvaryuriṣiro damūnā mitraḥ sindhūnāmuta parvatānām ||

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