What are the consequences for a husband who swore an oath that he would not book a trip for his wife or that she would not come to him from her city before he finishes his exams, and is it permissible for him to allow her to come for a necessary reason such as the treatment of their child?

If a husband swears an oath of divorce that he will not bring his wife to his country of residence until she completes her exams, then if the exams are cancelled or suspended, he does not break his oath if he brings her. However, if he brings her family for the treatment of his child or similar reasons, then he breaks his oath.