What is the ruling on one who vows to pray or perform i'tikaf (spiritual retreat in the mosque) and specifies a duration, then intentionally abandons it?

Question : May Allah reward you. If a person makes a vow to pray, perform i'tikaf, or fast, and specifies the time in which he will fast or pray, and then intentionally abandons it, do we say that it is like abandoning his prayer, so that he does not perform it and there is nothing upon him?

Answer : No, no, no. This is obligatory by the original ruling of the Shari'ah, and the Shari'ah has specified it. As for this, it is what he specified himself. Yes.