What is the ruling regarding a man's statement to his wife, "You are unlawful to me," in a moment of anger, and does this entail an expiation for Dhihar or a divorce?

Jurists differ on the ruling concerning the prohibition of one's wife. It depends on the husband's intention. If he intended divorce (talaq), or dhihar (a form of injurious assimilation of one's wife to one's mother), or an oath (yamin), then each has its own ruling. If he did not intend anything, then an expiation for an oath (kaffarat yamin) is incumbent upon him. This is a valid and strong opinion.