Padma Purana 6.224.68

Padmapurāṇa 6.224.68

tasmādvaividhivaddhāryāḥ śaṃkhacakrādihetayaḥ
brāhmaṇānāṃviśeṣeṇavaiṣṇavānāṃviśeṣataḥ