Bá 'to walk' is mostly not followed by a preposition to indicate the destination, but sometimes the prepositions pa 'to' or na 'in, at, ...' can follow. Ben 'to come' is always followed by the preposition di to indicate the place of origin.
Source: da Silva 1987: 35
Source: da Silva 1987: 49
Source: da Silva 1987: 94
Source: Brüser et al. 2002: s.v. ben