If a man says to his wife, "You are forbidden to me," is this zihar or an oath?

The Shaykh : Now, if a man forbids his wife and says, "You are forbidden to me," but does not say, "You are to me like the back of my mother," is this an oath or is it zihar?
Some scholars hold that it is zihar, while others hold that it is an oath. The more likely view is that it is an oath, as it falls under the general meaning of the statement of Allah the Exalted: .
For the wife is among what Allah has made lawful for him, so if he forbids her, her prohibition is an oath.
This is what is authentic from Ibn 'Abbas (may Allah be pleased with him) in one of the two narrations from him: . And on this basis, nothing is excluded from this general rule.
These are three matters that occur frequently: zihar, second is divorce, and third is prohibition.
And it is obligatory for the believer to know the ruling of Allah in all of them, if it is possible for them to come from him, so that he does not utter them except in the prescribed manner.