इन्दु , also known as सोम is lauded as the thousand-eyed purifier, seeing all and sustaining thousands [rv-9-60-1 ] rv • Book 9 . As the purifier flows through the filter, it symbolizes purity and vigor, proceeding to the vessels and entering the heart of इन्द्र [rv-9-60-2 ] rv • Book 9 . This flow of सोम aims to please इन्द्र and bless devotees with sustenance and progeny [rv-9-60-4 ] rv • Book 9 .