Shivapurana 7.6.21

Śivapurāṇa (complete text) 7.6.21

naiṣṭhikyanaiṣṭhikī bhedād dvividhaiva hi kīrtitā ṣaḍ vidhā naiṣṭhikī jñeyā dvitīyaikavidhā smṛtā