Example 161 here illustrates the use of pusha 'push' followed by a PP using riba 'on' which can be interpreted as either locational or directional. The context of this utterance makes it locational rather than directional. In other words, there are no special directional prepositions that can be used to disambiguate this type of utterance. The second example illustrates the use of a riba-PP with an "at-rest" interpretation.
A serial verb construction such as pusha bai 'push go' or pusha bini 'push come' can be constructed. However, the goal argument has to take the form of a PP or an Adverbial.
Source: Kouwenberg and Muysken 1995: 210
Source: nd: 30 June 2009, p.3