Skandapurana 6.3.1.20

6.3.1.20

yo na veda purāṇaṃ hi na sa vedātra kiṃcana .
katamaḥ sa hi dharmo'sti kiṃ vā jñānaṃ tathāvidham .. 1.20 ..

He who does not know the Purāṇa knows nothing here at all. / What kind of righteousness is that, or what kind of knowledge is that— (1.20)