Does a hundred thousand Saudi Riyals in charity become obligatory upon someone who vowed it and then what he vowed it upon came to pass, or is an expiation for an oath sufficient, knowing that he owns four hundred thousand Saudi Riyals and regrets his vow?

The questioner must fulfill his vow, based on the Prophet's (peace and blessings be upon him) saying: "Whoever vows to obey Allah, let him obey Him." A vow is when a legally responsible person obligates himself to something that Sharia has not obligated him to. The Prophet (peace and blessings be upon him) forbade making vows, saying: "Indeed, it does not avert anything; rather, it is used to extract [wealth] from the stingy." The majority of scholars hold that it is disliked, but they unanimously agree that it is obligatory to fulfill a vow once it is made. Therefore, the one who made the vow must give in charity what he vowed, and an expiation for an oath is not sufficient for him if he is able to fulfill it, unless his intention in making the vow was to prevent himself from doing something, in which case its ruling is that of an oath and he must offer an expiation for an oath.