Rigveda 1.157.5
यु॒वं ह॒ गर्भं॒ जग॑तीषु धत्थो यु॒वं विश्वे॑षु॒ भुव॑नेष्व॒न्तः ।यु॒वम॒ग्निं च॑ वृषणाव॒पश्च॒ वन॒स्पतीँ॑रश्विना॒वैर॑येथाम्॥
yuvaṃ ha garbhaṃ jagatīṣu dhattho yuvaṃ viśveṣu bhuvaneṣvantaḥ |yuvamagniṃ ca vṛṣaṇāvapaśca vanaspatīm̐raśvināvairayethām ||
Our plain-language meaning of this verse is waiting for scholar review.
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