Prayer: What is the prayer and fasting rule if I intend to stay 10 days at work (not my watan), but visit a nearby city before, during, or after that period?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: What is the prayer and fasting rule if I intend to stay 10 days at work (not my watan), but visit a nearby city before, during, or after that period?

English:

Question #655:

I work in a place which is less than the shar‘ī distance from the nearby city. Since none of the two places is my watan, I make the intent to stay ten days in my place of work in order to perform full prayer and fast there. When I decide to stay in my place of work for ten days, I do not intend to leave for the neighboring city during those ten days or afterwards. What is the shar‘ī rule in the following situations:
i. If I leave for the nearby city in an emergency or for a business before the end of the ten days, and stop there for about two hours before returning to my place of work?

ii. If I leave for the city after the end of the ten days, visiting one of its districts without passing the shar‘ī distance, and stay there for a night before returning to my residence?

iii. If I leave for the city after ten complete days, intending to visit a certain district, but I change my mind after reaching it and decide to go to another point which is at more than the shar‘ī distance from my city of residence?

Answer #655:

First and second: If one does not have a primary intention to leave the place, after the rule of full prayer is established — though it be by performing at least a single four-rak‘ah prayer — leaving it for a place at less than the shar‘ī distance, in one or several days – by day, it is meant from sunrise to sunset as perceived by common view, does not harm the intention of staying for ten days, whether he leaves it before or after completing the ten days. Therefore, he should perform full prayers and fast until he starts a new journey.

Third: In the given case that no shar‘ī travel has been materialized, the intention of stay remains intact.for half of a day each time.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer