Skandapurana 6.3.6.22

6.3.6.22

evaṃ sā dakṣiṇā gaṃgā mahāpātakanāśinī .
uttare jāhnavī deśe puṇyā tvaṃ dakṣiṇe śubhā .. 6.22 ..

Thus, you are the southern Gaṅgā, the destroyer of great sins; / the Jāhnavī is in the northern region, and you, auspicious and sacred, are in the south. 6.22