Ten things are part of the Fitrah

It was narrated from ‘Aishah that:
The Messenger of Allah (ﷺ) said:

“Ten things are part of the Fitrah:

Trimming the mustache,

trimming the nails,

washing the (finger) joints,

letting the beard grow,

using the Siwak,

rinsing the nose,

plucking the armpit hairs,

shaving the pubes,

and washing with water (after relieving
oneself).”

Mus’ab bin Shaibah said:

“I have forgotten the tenth, unless it
was rinsing the mouth.”

Sunan an-Nasa’i 5040