The सुक्त highlights the significance of सोम , personified as a wise seer, who illuminates his divine parents, heaven and earth [rv-9-9-3 ] rv • Book 9 . As सोम is effused by the fingers, it enriches the seven rivers [rv-9-9-4 ] rv • Book 9 and offers abundant sustenance to the devoted [rv-9-9-2 ] rv • Book 9 . This cosmic force purifies during sacrifices, dispelling darkness, and bestows prosperity and understanding [rv-9-9-9 ] rv • Book 9 .