Travelling is a reason which permits the four-Rak`ah prayers to be shortened to two Rak`ah. The traveller may pray Witr after praying `Isha with Maghrib and praying them at the time of Maghrib.

1- It is permissible to combine Dhuhr and `Asr prayers, and Maghrib and `Isha’, for one who is travelling. It is also permissible for any traveller to combine prayers whether he has made a stop or is on the road. 2- It is permissible to pray `Asr in the train whilst sitting according to the majority of scholars if you cannot pray standing.

The distance which allows a traveller to break his fasting and shorten his prayers is approximately 80 km according to the view of the majority of scholars. This distance is called travelling according to the custom of the Muslims. So if a person travels by camel, car, plane or ship, for this distance or more, he is regarded as a traveller.

1- It is permissible for the person who is not travelling to combine two prayers if it will be too difficult for him to perform the second prayer on time. 2- It is permissible for you to bring `Asr forward and pray it with Zuhr in your home city if you think it most likely that you will not be able to pray it on time because of travelling.

If you are travelling and you prayed `Isha’ before Maghrib, your `Isha’ prayer is not valid because you offered it before Maghrib and offering the prayers in the correct order is a condition of combining prayer when travelling.