Rigveda 3.15.4

अषा॑ळहो अग्ने वृष॒भो दि॑दीहि॒ पुरो॒ विश्वा॒: सौभ॑गा संजिगी॒वान् ।य॒ज्ञस्य॑ ने॒ता प्र॑थ॒मस्य॑ पा॒योर्जात॑वेदो बृह॒तः सु॑प्रणीते॥

aṣāḷaho agne vṛṣabho didīhi puro viśvā: saubhagā saṃjigīvān |yajñasya netā prathamasya pāyorjātavedo bṛhataḥ supraṇīte ||

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