Rigveda 5.4.9

विश्वा॑नि नो दु॒र्गहा॑ जातवेद॒: सिन्धुं॒ न ना॒वा दु॑रि॒ताति॑ पर्षि ।अग्ने॑ अत्रि॒वन्नम॑सा गृणा॒नो॒३ऽस्माकं॑ बोध्यवि॒ता त॒नूना॑म्॥

viśvāni no durgahā jātaveda: sindhuṃ na nāvā duritāti parṣi |agne atrivannamasā gṛṇāno3'smākaṃ bodhyavitā tanūnām ||

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