Is expiation obligatory for an oath of divorce made in a state of anger to nullify a threat that befell the wife?

An oath of divorce has no expiation. Therefore, either the swearer fulfills his oath, and there is nothing upon him, or he breaks it, and his divorce takes effect. Consequently, either you prevent your wife from attending weddings for a year, and there is nothing upon you, or you permit her before the year passes, and her divorce takes effect, and you may take her back if it was a revocable divorce (i.e., less than three pronouncements). According to some scholars, such as Ibn Taymiyyah, you are permitted to break the oath and allow your wife to go without the divorce taking effect, but you would then be required to pay an expiation for breaking an oath.