Skandapurana 6.3.229.5

6.3.229.5

narmadācaritaṃ puṇyaṃ śṛṇu tasyāsti yatphalam .
yatphalaṃ sarvavedaiḥ syātsaṣaḍaṅgapadakramaiḥ .. 229.5 ..

Listen to the holy life-story of the Narmadā and the fruit that belongs to it: / whatever fruit would come from all the Vedas with the six auxiliary limbs, word-by-word recitations, and step-by-step recitations,