The ruling on saying "I am forbidden to you..." to one's wife

Question:
What is the ruling on a man who says to his wife: "I am forbidden to you if you go to so-and-so's house," knowing that they are friends? Please inform us. May Allah reward you with good.

Answer:
This has two cases:
One is if he intends to forbid her and prevent her from going. In that case, if she goes to the forbidden house, he owes the expiation for zihar, which is freeing a slave. If he is unable to do so, he must fast for two consecutive months. If he is unable to do that, he must feed sixty poor people, as is the expiation for zihar mentioned in the chapter of .
As for if he intended only to prevent her, and did not intend to forbid her, but rather intended to frighten her and prevent her only, and did not intend to make himself forbidden to her if she did it, but his intention was to frighten her, warn her, threaten her, and prevent her; then he owes the expiation for an oath, which is feeding ten poor people, or clothing them, if she goes. Unless he intended "except with my permission." If he intended to prevent her except with his permission, then if he gives her permission, he owes nothing. As for boycotting the house, is he her brother?
The student: Yes, they are his friends.
The Shaykh: As for boycotting this house, there is a detail in this:
If the people of the house harm her, and there is danger for her from them, and she fears for her from their evil corruption; then he should not permit her to go, and he does not need to swear an oath. It is obligatory for her to stay away from them because of their evil, even if her husband did not swear an oath over her, even if he did not swear, even if he did not prevent her, she must refrain. If he prevents her, it is obligatory for her to refrain in obedience to him and out of fear of evil.
As for if they are good and righteous neighbors, then he should not prevent her from them. He should allow her to go; because neighbors visit each other, and they find comfort in one another, and her staying in the house constantly and constantly may harm her and cause her psychological complexes. So, allowing her to go to her good neighbors and to her good family is a required matter, along with urging and encouraging her to maintain modesty and stay away from the causes of fitnah.