We see some people when they need to break [away from] their prayer [short] for some emergency, or to join [the congregation when] the imaam [is about to start the prayer], or if they have invalidated their prayer – they do the tasleem. So is this act [of theirs] correct, or will the intention [to terminate the prayer] suffice?
[At the moment] I am travelling, so if I joined a congregation of local residents for the ‘ishaa prayer, [as a traveller] should I finish my prayer after two rak’ahs, or should I pray all four rak’ahs along with them?
…and you mentioned that the [voluntary] prayer must be terminated; so how do you terminate it, would it be by the tasleem?
A man entered the masjid, and the imaam had just arisen from the rukoo’ [position], and [as such] he does not know whether it is the final rak’ah or not. The question is, should he join the imaam [in congregation], or should he wait so he can confirm for sure?