Saurapurana 34.49

34.49

babhūvurupadeśena nāradasya mahātmanaḥ
pāṣaṇḍamārgabhūyiṣṭhā saṃjātā dānavāstadā

came to be through the teaching of the high-souled Nārada. / The Dānavas then became mostly inclined to heretical ways;