Rigveda 8.74.9

सा द्यु॒म्नैर्द्यु॒म्निनी॑ बृ॒हदुपो॑प॒ श्रव॑सि॒ श्रव॑: ।दधी॑त वृत्र॒तूर्ये॑॥

sā dyumnairdyumninī bṛhadupopa śravasi śrava: |dadhīta vṛtratūrye ||

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