What is the Ruling on Saying it’s forbidden for me to Eat this Thabeeha

This act of forbidding that which is permissible is treated like an oath. {O You who believe! do not forbid yourselves good and pure things which Allâh has made lawful for you, and do not transgress. Verily, Allah does not like the transgressors. [87] And eat of what Allah has provided you of (things) lawful, good and pure. And fear Allah, in whom you repose your faith. [88] Allah will not punish you for what is unintentional in your oaths,} [Surat Al-Ma’idah:89]. He (Allah the Exalted) called it an oath. When the Messenger of Allah ﷺ prohibited Maria the Coptic or honey on himself, Allah The Exalted said (meaning of the context): {O Prophet, why do you prohibit [yourself from] what Allah has made lawful for you, seeking the approval of your wives, and Allah is Forgiving and Merciful.} [Sūrat At-Tahrim :1]. Then He said (meaning of the context): {Allah has already ordained for you [Muslims] the dissolution of your oaths} [Surat At-Tahrim :2], pointing to the Aya in Surat Al-Ma’idah {So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or the freeing of a slave. But whosoever cannot find [or afford it] - then a fast of three days [is required]. That is the expiation for oaths when you have sworn.} [Surat Al-Ma’idah 89] So, Allah has made the act of forbidding that which is Halal (permissible) an expiated oath. It should be expiated as an oath expiation, and one eats from what he had forbidden for himself.