The ruling on the oath of one who challenges another not to do something

Question:
After this, we move on to a message received by the program from one of the listening brothers, identified as (M. A. M). Our brother asks: What is the ruling if a person challenges another person to do something and swears by Allah that he will not do it, and the other person is able to prevent him? Does he have to pay an expiation?

Answer:
If he swears that he will not do something and then does it, he must pay the expiation. For example, if he says, "By Allah, I will not visit so-and-so," and then visits him, or says, "By Allah, I will not make you lunch or dinner," and then does, he must pay the expiation. Yes.

The presenter: May Allah reward you with good.

The Shaykh: The expiation for an oath.

The presenter: The expiation for an oath?

The Shaykh: Yes.

The presenter: And what is it?

The Shaykh: Feeding ten poor people, or clothing them, or freeing a slave. If he is unable to do so, meaning he does not have the ability to feed, clothe, or free a slave, he must fast for three days. Yes.

The presenter: May Allah reward you with good. How is the feeding done? Is one meal sufficient?

The Shaykh: Half a sa' for each person; ten poor people, each receiving half a sa'. Or he can provide them with one dinner, or one lunch. Yes.

The presenter: May Allah reward you with good, and may He do you good.