Is it obligatory to fulfill a vow of disobedience?

The questioner : Regarding the vow, I mean, while I was still in the army, I made a vow that involved some difficulty. It was that a person would put something in a jar containing some filth. May Allah reward you for the intensity of what the person saw. So what should he do?

The Shaykh : In any case, as long as you are being vague with us and not being explicit, we will forgive you, but we ask you: do you consider this vow a vow of obedience or a vow of disobedience? If it is not understood, how can I answer you? You know that the statement of the Messenger of Allah (peace and blessings be upon him) is explicit on this matter So if the vow you made, whose nature and reality we do not know from you, is obedience, it is obligatory for you to fulfill it if you have the means to do so. And if it is disobedience, it is not permissible for you to fulfill it, so you must pay an expiation. Now, do you want to explain the situation you were in so that we can explain the answer to you, or as you judge, so shall you be judged.

The questioner : ... We have a colleague who vowed to pray one million rak'ahs.
Al-Halabi : Is this disobedience or obedience?

The Shaykh : Disobedience.

The questioner : I would put some of the waste and break the door of the section or the company in which I served.

The Shaykh : So it appears you are now free from the military.

The questioner : Free.

The Shaykh : You broke the door, meaning.

The questioner : No, I did not break it. If I had broken it, O Shaykh, would I fulfill the vow or pay an expiation?

The Shaykh : No, an expiation.

The questioner : Meaning like the expiation for an oath?

The Shaykh : Yes, that is right.