Traveler's prayer
part 4

The fourth condition is that the traveler does not intend to pass through his hometown before reaching 8 Farsakh and stay at some place for 10 days or more. Hence a person, who intends to pass through his hometown and stay at a place for 10 days, before he reaches of 8 Farsakh, he should offer full prayers.

1315. A person, who does not know whether or not he will pass through his hometown before reaching 8 Farsakh or through a place where he will stay for 10 days, should offer full prayers.

1316. A person who wishes to pass through his hometown, before he reaches 8 Farsakh, or to stay at a place for 10 days, or if he is undecided about it, should offer complete prayers even if he later abandons the idea of passing through his hometown, or staying at a place for 10 days. However, if the remaining journey is of 8 Farsakh or adds up to 8 Farsakh on return, he should shorten his prayers.