The Journey Should Not Be for a Haram Purpose
Issue No.1134- If a person travels in order to commit theft, treachery or other haram deeds, he should offer complete prayer. The same ruling applies when travelling itself is haram, for instance, when travelling involves a significant harm to one’s body, or when a wife travels without the permission of her husband (based on obligatory precaution), or when someone travels in spite of his parent's prohibition acknowledging the fact that it results in their annoyance. However, if the journey is obligatory upon him (e.g., an obligatory ḥajj), then the permission of the husband or parents is not necessary, therefore one should perform qaṣr prayer.
