Vaṃśānuvārṇana and the Transition to the Fourth (Upasaṃhāra) Pada
बृहदाद्यानि सामानि कनिष्ठान्सप्त तान्विदुः / सप्त लोकाः पवित्रास्ते भ्राजिताः सप्तसिंधवः
bṛhadādyāni sāmāni kaniṣṭhānsapta tānviduḥ / sapta lokāḥ pavitrāste bhrājitāḥ saptasiṃdhavaḥ
Among the Sāman chants beginning with Bṛhad, seven are known as the lesser ones. Those seven lokas are holy, and the seven radiant Sindhus (rivers) as well.