4.28.1
त्वा यु॒जा तव॒ तत् सो॑म स॒ख्य इन्द्रो॑ अ॒पो मन॑वे स॒स्रुत॑स्कः | अह॒न्नहि॒मरि॑णात् स॒प्त सिन्धू॒नपा॑वृणो॒दपि॑हितेव॒ खानि॑ ||
ALLIED with thee, in this thy friendship, Soma, Indra for man made waters flow together, Slew Ahi, and sent forth the Seven Rivers, and opened as it were obstructed fountains.