The ruling on shortening the prayer and combining prayers for one who does not know the duration of his stay

Question:
The first question says: You know, Your Eminence, that we are performing a duty in Hajj with the entire battalion, and we do not know the time at which we will move from Makkah to some other location. We are waiting, and each of us has his device under his head, awaiting the order from the senior leadership to move. We do not know whether we will move or remain until Hajj is over? In this regard, we ask Your Eminence: Is it permissible for us to shorten and combine, or to shorten without combining, or to complete the prayers? May Allah preserve you, Your Eminence.

Answer:
If you do not know the duration of your stay, but rather you are under orders, then a person in this situation, if he is directed to Makkah or elsewhere to stay there for a period whose exact length he does not know, the Sunnah for him is to shorten the prayer, praying two rak'ahs for Dhuhr, 'Asr, and 'Isha. And if he combines them, there is no harm. And if he prays each prayer in its proper time, that is better, as long as he is a resident staying there.
If a period of more than four days is determined for you, a period you will stay for more than four specific days that you know, that you will remain for ten days or more, then you pray four rak'ahs and do not combine, because you are in the ruling of residents. But if a person does not know whether he will stay for a month, a year, a day, or two days? He has no knowledge of it, but is ordered to do so, and he has no knowledge of the duration of the stay, then he prays two rak'ahs for Dhuhr, 'Asr, and 'Isha, and there is no harm in combining. However, if he leaves off combining and prays each one in its time, that is better, because the Prophet (peace and blessings be upon him), when he performed the Farewell Hajj, prayed in the building each prayer in its time, two rak'ahs. He prayed Dhuhr in its time, two rak'ahs, and 'Asr in its time, two rak'ahs, and Maghrib in its time, three rak'ahs, and 'Isha in its time, two rak'ahs, and Fajr in its time, because he was a resident there during the days of stoning.
As for if a person does not know when he will be released, and he is prepared for this matter, then combining is permissible for him, and shortening is expedient for him. But if he is at ease and a resident, then it is better to pray each prayer in its time. May Allah guide you. Yes. As long as he does not know when he will be released, whether after two days, three days, or more, he prays two rak'ahs. But when the call to prayer is made? And it develops? That he will stay for a month? When he decides that he will stay from the first of Dhul-Hijjah to this day of Dhul-Hijjah, let him pray four rak'ahs. If he decides that he will stay for more than four days in any place, he prays four rak'ahs, and does not combine either. We ask Allah for success for everyone.