Narrated 'Aishah:that the Prophet (ﷺ) said: "Ten are from the Fitrah: Paring the mustache, leaving the beard to grow, Siwak, cleaning the nose with water, paring the fingernails, washing the knuckles, plucking the underarm hair, shaving the pubic hairs, and Intiqas with water

English translation · Jami' at-Tirmidhi