What is the loose-fitting pant in which prayer is permissible?

The questioner : O our Shaykh, regarding the issue of this morning, one of the worshippers was wearing a pant, and my brother pointed it out to me, asking if it was loose-fitting. I told him that I do not consider it loose-fitting; the pant he was looking at was only slightly wider than this one.
The student : Not much wider than this.

The questioner : Not by much. So we want to ask you and know what is the defining ruling for a loose-fitting pant: the loose-fitting pant in which it is permissible to pray, and the pant in which it is not permissible to pray.

The Shaykh : It is the one that, when worn by the wearer, does not fit tightly.
The student : On his legs, or...

The Shaykh : Be patient. By its nature, being a pant, it does not fit tightly over the private parts.
The student : When bowing or prostrating, there is no effect from that.

The Shaykh : When bowing and prostrating, look, I am wearing this now. When I do this, ha, ha, but... it does not fit tightly. As for the pant, it fits tightly.
The student : This is what I meant. This is what I am referring to.
Another student: No, there is no specific limit.
The student : By Allah, O our Shaykh, I saw a man who was praying the midday prayer with us, and he was wearing a pant wider than the pant worn by the person who prayed the dawn prayer with us. And when he prostrated, O our Shaykh, by Allah, I saw his testicles protruding.
Another student: ...

The Shaykh : I say, by way of reminder and advice, do not get involved in such matters...
The student : By Allah, O our Shaykh, I always say this to him.

The Shaykh : When you want a community that accepts general advice, the pant is not Muslim clothing, and the matter is ended there. But when you want to get into the details, it means you will decide to wear the pant, but you will try to set conditions for it that cannot be met.
The student : You have spoken well, O Shaykh.

The Shaykh : Therefore, we must get rid of the pant as non-Islamic attire, as non-Islamic attire. Then, any clothing that fits tightly, and is not European or foreign attire, might be Islamic attire. For example, women, especially if they are somewhat pious, if they wear the loose abaya in one way or another, there is tightness here. This is excessive asceticism, severe excessive asceticism. But the important thing is that in the normal state, there should be nothing that fits tightly. Now, the pant is tailored to fit tightly, tailored specifically to fit tightly, so one must avoid it.
The student : O Shaykh, now there is another issue related to advice. Sometimes I speak, and I know that among the brothers... and there are good general relations between us, peace, calling to Islam, and so on, and we advise each other in style and so on. But sometimes, when I say "your beliefs are corrupt in general," like that, of course, I have immediately put a barrier between myself and him. He no longer accepts anything from me, even if it is a discussion afterwards, as long as I have spoken about him regarding clothing and so on. This happens often with our brother... the brothers.

The Shaykh : ... because his heat is still strong, as Allah wills.
The student : We fear for him... O Shaykh, so if we give you the needle.
Another student: We want to visit you more and more.

The Shaykh : ... I must live...
The student : May Allah reward you with good.

The Shaykh : And beware of that.