Naradapurana 2.25.19

Nāradapurāṇa 2.25.19

na ca rakṣāvihīno 'haṃ śatruḥ ko 'pina me 'sti ca /
evaṃ jñātvā dvijaśreṣṭhā vaiṣṇavavrataśālinaḥ //