Trimming the mustache, which is the hair growing above the lower lip and the lip alone

The Shaykh : The third: trimming the mustache, which is the hair growing above the lower lip and the lip alone. Everything that circles the upper lip—I said lower, but the correct is upper—everything that circles the upper lip is a mustache. This is to be trimmed, because if it is left, it grows long and becomes contaminated by what comes out of the nose, which is unpleasant. Also, when drinking, the contaminated hair comes into contact with the water, making it disgusting, and it may carry harmful microbes. In any case, it is part of the Sunnah (recommended practice). The most important thing is that it is from the Sunnah and a means of drawing near to Allah (Mighty and Majestic) when you trim it. The fifth.
The fourth: trimming the nails, meaning clipping them. This refers to the nails of the hands and feet. It is not permissible to trim them until they reach the flesh, because this harms the person and may result in an abscess or something similar. Rather, they should be trimmed in a moderate manner.
The fifth: plucking the armpit hair if there is hair there. It should be plucked, not trimmed or shaved; plucking is preferable because it removes it completely and weakens the roots so that it does not grow back. This is a requirement prescribed by the Shari'ah (Islamic sacred law). These are five things: circumcision, shaving the pubic hair, trimming the mustache, clipping the nails, and plucking the armpit hair.
As for circumcision, it is done once and the matter is finished. Here I point out an issue: some people may be born circumcised, without a foreskin; you find the glans exposed and visible from the moment they are born, and we have witnessed this with our own eyes. Such a person is not circumcised, because there is nothing left to circumcise for. As for the remaining four: shaving the pubic hair, trimming the mustache, clipping the nails, and plucking the armpit hair: they should not be left for more than forty days. : They have a limited duration that should not be exceeded. The best way to keep track of the forty days is to set a specific time for yourself, such as saying: “The first Friday of every month, I will perform this procedure,” so that you do not forget. Because sometimes a person forgets, and forty or fifty days may pass without them remembering. If you set a specific time, for example, saying: “The first Friday of every month, I will remove these four things,” the time is kept in check. However, this is not a Sunnah (recommended practice) in itself; it is merely to keep track of the time for performing the Sunnah, which is not to leave them for more than forty days. May Allah grant success.