Shortening the Prayer for a Traveler Whose Duration of Stay Is Unknown

Question:
This brother Abu Faisal says: Regarding combining prayers for a traveler, O Shaykh, he is with his work delegation and does not know when he will return to his country, the Kingdom. Will it be one day, several days, or a month? Knowing that their stay there is not within their control, for they do not know when they will return to their original country.

Answer:
A traveler may shorten the prayer while on the road, both going and returning. He may also shorten the prayer while staying in a place during his travel, provided the stay is four days or less. Likewise, if he does not know the duration of his stay, he does not shorten the prayer, because he is still considered a traveler. However, if he knows that his stay will be more than four days, it is not permissible for him to shorten the prayer; rather, he must complete the prayer, because the state of travel is ended by this stay. Yes.