What is the ruling on one who picks his nose in the mosque and then wipes what is on his hand on the mosque’s carpet?

The questioner : Shaykh, may Allah reward you. Indeed, . Some people today, I mean, we see them; you find one of them messing with his nose all the way to the edge of the mosque, and he leaves what comes out of his nose either to drop on the ground or sometimes wipes it on the mosque carpet.

The Shaykh : I seek refuge in Allah.

The questioner : Or sometimes, for example, he is a shepherd of sheep and cattle and enters the mosque, and you find that, I mean, his head and he defiles the mosque. And this.

The Shaykh : As for the first, this is bad manners. For a person to clean his nose during the prayer is bad manners, bad manners with Allah (Mighty and Majestic). A person, among people, sees that it is bad manners and a disgrace to clean his nose, to put his finger in his nose and clean it; people see it as contrary to dignity. So how about when you are before Allah (Mighty and Majestic)? And if the matter is as you said, that it happens, I mean, there is annoyance or mucus, and then he rubs it on the ground of the mosque, this is also a transgression. Because perhaps a trace remains.

The questioner : Perhaps it does not become mucus, but sticky substances from his nose

The Shaykh : What?

The questioner : Sticky substances in his nose that do not become mucus; he wipes his finger on the mosque’s carpet.

The Shaykh : This may stick to it or may not. In any case, whatever a person does out of good manners before Allah is better.