Rig Veda
तमु॑ न॒: पूर्वे॑ पि॒तरो॒ नव॑ग्वाः स॒प्त विप्रा॑सो अ॒भि वा॒जय॑न्तः । न॒क्ष॒द्दा॒भं ततु॑रिं पर्वते॒ष्ठामद्रो॑घवाचं म॒तिभि॒: शवि॑ष्ठम् ॥ तमु नः पूर्वे पितरो नवग्वाः सप्त विप्रासो अभि वाजयन्तः । नक्षद्दाभं ततुरिं पर्वतेष्ठामद्रोघवाचं मतिभिः शविष्ठम् ॥
To him the seven sages, our ancient progenitors, performing the nine days' rite, were offerers of (sacrificial) food, celebrating with hymns the very strong (Indra), the humiliator of foes, the traverser of the heavens, he dweller in the clouds, whose commands are not to be disobeyed.
english translation