Vaishnava Dharmashastra 5.132

5.132

brahmacārivānaprasthabhikṣugurviṇītīrthānusāriṇāṃ nāvikaḥ śaulkikaḥ śulkam ādadānaś ca ||

Likewise, a ferry-man, or an official at a toll-office, who takes a fare or toll from a student, or Vânaprastha (hermit), or a Bhikshu (ascetic or religious mendicant), or a pregnant woman, or one about to visit a place of pilgrimage;