Bhagavatapurana 4.25.19

4.25.19

nānāraṇya-mṛga-vrātair anābādhe muni-vrataiḥ /
āhūtaṃ manyate pāntho yatra kokila-kūjitaiḥ //

19. To which spot, free from the fear of various wild animals behaving like sages, the traveller thinks himself invited by the notes of the Cuckoo;