What is the ruling on swearing by the innocence of Islam, and is it considered disbelief and apostasy from the faith, and must it be fulfilled, and is it an oath, and is repentance required for it?

If a person says: "I am innocent of the religion of Islam if such and such happens," the view of the majority of scholars is that this is not an oath and does not require an expiation for an oath. However, he must engage in sincere repentance, seeking forgiveness, and performing righteous deeds. Meanwhile, some scholars consider this statement apostasy and that its utterer leaves the fold of Islam, basing their argument on the hadith: "Whoever swears by a religion other than Islam, falsely and intentionally, then he is as he said." Many scholars have interpreted this hadith as a threat and a stern warning, not as an act of disbelief (takfir). The conclusion is that one is not obligated to act upon this vow because it is not a legally binding oath, and what is obligatory is repentance to Allah and accustoming oneself to swearing by the names and attributes of Allah when necessary.