Rigveda 1.140.4

मु॒मु॒क्ष्वो॒ ३ मन॑वे मानवस्य॒ते र॑घु॒द्रुव॑: कृ॒ष्णसी॑तास ऊ॒ जुव॑: ।अ॒स॒म॒ना अ॑जि॒रासो॑ रघु॒ष्यदो॒ वात॑जूता॒ उप॑ युज्यन्त आ॒शव॑:॥

mumukṣvo 3 manave mānavasyate raghudruva: kṛṣṇasītāsa ū juva: |asamanā ajirāso raghuṣyado vātajūtā upa yujyanta āśava: ||

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