Rigveda 10.107.5

दक्षि॑णावान्प्रथ॒मो हू॒त ए॑ति॒ दक्षि॑णावान्ग्राम॒णीरग्र॑मेति ।तमे॒व म॑न्ये नृ॒पतिं॒ जना॑नां॒ यः प्र॑थ॒मो दक्षि॑णामावि॒वाय॑॥

dakṣiṇāvānprathamo hūta eti dakṣiṇāvāngrāmaṇīragrameti |tameva manye nṛpatiṃ janānāṃ yaḥ prathamo dakṣiṇāmāvivāya ||

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