Al-Mu'tamir narrated that his father said:
"I heard Talq mentioning ten things that have to do with the Fitrah: Using the Siwak, trimming the mustache, clipping the nails, washing the joints, shaving the pubes, rinsing the nose, and I am not sure about rinsing the mouth."
It was narrated from 'Aishah that:
The Messenger of Allah (ﷺ) [SAW] said: "Ten things are part of the Fitrah: Trimming the mustache, trimming the nails, washing the joints, letting the beard grow, using the Siwak, rinsin…
It was narrated that Talq bin Habib said:
"Ten things are from the Sunnah: Using the Siwak, trimming the mustache, rinsing the mouth, rinsing the nose, letting the beard grow, trimming the nails, plucking the armpit hair…
It was narrated that Abu Hurairah said:
"The Messenger of Allah (ﷺ) [SAW] said: 'Five things are of the Fitrah: Circumcision, shaving the pubes, plucking the armpit hair, clipping the nails and trimming the mustache.'"
It was narrated that Abu Hurairah said:
"Five things are of the Fitrah: Clipping the nails, trimming the mustache, plucking the armpit hairs, shaving the pubes, and circumcision." (Sahih Mawquf)