f15.9 It is permissible to join the noon prayer (zuhr) and midafternoon prayer (`asr) during the time of either of them (N; or the Friday prayer (jumu`a) and midafternoon prayer in the time of the Friday prayer), and permissible to similarly join the sunset prayer (maghrib) and nightfall prayer (`isha) during the time of either, provided one joins them during a journey in which prayer may be shortened (def:f15.8(a,b,c,d)).
If one stops travelling (A: to rest, for example) during the time of the first of the two prayers, then this is the best time to join them, but if one is travelling steadily during the first time, the time of the second is better.
f15.10 The conditions for joining two prescribed prayers on a trip in the time of the first of them are:
(a) that the trip continue (A: until one finishes both prayers);
(b) that the first of the two be prayed first;
(c) that the intention to join the two prayers occur before finishing the first, either coinciding with the opening Allahu Akbar, or occuring during the prayer;
(d) and that one not separate the two prayers by waiting between them, though a short interval (A: meaning one that could contain two rak`as of the briefest possible) is of no consequence, nor is a brief search for water (dis: e12.3) by someone who has performed dry ablution (tayammum).
If one prays the second of the two prayers before the first (non-(b) above,), then that prayer is invalid (O: and must be repeated after the first, if one still wants to join them).
One must wait to perform the second of the two prayers until its own time if:
(1) (non-(a) above) one finishes one's journey before performing the second prayer;
(2) (non-(c)) one neglects to intend joining them during the first prayer
(3) or (non-(d)) one waits at length between them.
f15.11 If one has performed both prayers and the journey subsequently ends (A: whether in the time of the first prayer or the time of the second), they are and remain valid.
f15.12 The necessary condition for joining two prayers in the time of the second of them (A: in addition to f15.8 (a,b,c,d)) is that one make the intention to do so before the end of the first prayer's time (O: by an interval which could contain at least one rak`a). If one neglects this intention, one has sinned, and praying the first prayer during the second prayer's time is considered making it up.
f15.13 When joining two prayers in the time of the second, it is recommended (A: not obligatory):
(1) to pray the first one before the second;
(2) to not pause at length between them;
(3) and that the intention to join them be present during the prayer one performs first.
