Rigveda 4.39.6

द॒धि॒क्राव्णो॑ अकारिषं जि॒ष्णोरश्व॑स्य वा॒जिन॑: ।सु॒र॒भि नो॒ मुखा॑ कर॒त् प्र ण॒ आयूं॑षि तारिषत्॥

dadhikrāvṇo akāriṣaṃ jiṣṇoraśvasya vājina: |surabhi no mukhā karat pra ṇa āyūṃṣi tāriṣat ||

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