Skandapurana 6.3.230.12

6.3.230.12

tataḥ praśnādhikāraśca praśaṃsā narmadodbhavā .
tathā pañcadaśānāṃ ca pravāhānāṃ prakīrtanam .. 230.12 ..

then the authority of the question, and the praise of Narmadā's origin, / as well as the proclamation of the fifteen currents;