The Duty of One Who Remembers That He Is a Traveller During Prayer
Issue No. 1187- If a person begins offering a four rak‘at prayer, and recollects during prayer that he is a traveller, or that his journey is of eight farsakhs, he should complete the prayer in two rak‘ats provided that he has not gone into the rukū‘ of the third rak‘at. However, if he has gone into the rukū‘ of the third rak‘at, his prayer is void, and he should offer qaṣr prayer.