What is the trial of the *ahlas* mentioned in the hadith?

The questioner : Shaykh, we want clarification of the meaning of the word: *ahlas* in the hadith?

The Shaykh : And the *Ahnaf*?

The questioner : *Ahlās*!! The trial of the *ahlas*!?

The Shaykh : The *Ahnaf*?

The questioner : *Ahlās*, with the lam.

The Shaykh : *Ahlās*?!

The questioner: Yes.

The Shaykh : Yes, this is explained in the hadith first. Second, this is among the matters of the unseen (*ghayb*) in which it is not permissible for a Muslim to delve into the details. So it is left until it occurs, and it is not permissible to expand on its interpretation, just like the other matters of the unseen, including the divine attributes, in which one does not expand.

The questioner : But I did not understand its meaning, O Shaykh. I did not understand the meaning of the word *ahlas*. I did not understand its meaning.

The Shaykh : *Ahlās*: the plural of *hals*, which is staying in the house.

The questioner : Staying in the house.

The Shaykh: Ah, yes.

The questioner : May Allah reward you with good.
The student : We presented this chain of narration to you, O Shaykh.

The Shaykh : Yes... Yes, okay, now we cannot study it...
The student : You studied it.

The Shaykh : The treatise you are talking about?
The student: Yes.

The Shaykh : It is it.

The questioner : This one, yes.

The Shaykh : I study it!

The questioner : Yes, I want your writings, your writings, O Shaykh.

The Shaykh : There is no room for it now.

The questioner : No room for it?!

The Shaykh : No.