(1) باب الْفِطْرَةِ
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)
Reference (IT): Sunan an-Nasa'i 5041 (IT)
In-book reference (IT): Book 48, Hadith 2 (IT)
English translation (IT): Vol. 6, Book 48, Hadith 5044 (IT)