The ruling on swearing an oath by saying: "By the Existent"?

The questioner:
He says: Honorable Shaykh, may Allah grant you success, does an oath become valid by what is reported about Allah, such as saying "By the Existent" or "By the Guide" or "By the Everlasting"?

The Shaykh:
In the established names of Allah. By the beautiful names of Allah.

The questioner:
"The Existent" is not among the names of Allah. "The Existent" is not among the names of Allah, and it does not contain praise either.

The Shaykh:
All people, and religion, and all things are existent. There is no praise in "the Existent." Rather, the names of Allah contain praise; they have a great meaning. That is why they are called the Most Beautiful. The names of Allah are the Most Beautiful. They are all the Most Beautiful. Because they indicate a great meaning in the right of Allah, Glorified and Exalted is He. As for "the Existent," there is no praise in it. The fact that a thing is existent does not contain praise. Therefore, it is not among the names of Allah. Yes.