Matsyapurana 122.74

122.74

mahatī saptamī proktā punaścaiṣā dhṛtiḥ smṛtā
anyāstābhyo 'pi saṃjātāḥ śataśo 'tha sahasraśaḥ //

There are seven rivers in each khaṇḍa. Their waters are pure and sacred and each one has a duplicate name. The first one is Dhûtapâpâ which is also known as Yoni. Sîtâ or Niśâ is the second. The third one is Pavitrâ also called Vitṛiṣṇâ. The fourth one is Hlâdinî or Chandramâ. The fifth one is Vidyuta or Śuklâ, the sixth one is Pundrâ or Vibhavasî. The seventh one is Mahatî also called Dhriti. There are thousands of their branches that run where Indra pours down rains. Thus I have described the Kuśa Dvîpa. Its measurement has been described while describing the measurement of Śâkadvîpa. It is surrounded by the Ghṛita Maṇḍa Samudra.—70-76.