Umar bin Naf' al-Dwy عمر بن نافع العدوي · The Book of Adornment

"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."

Who attributed it to the Prophet : "The angels do not accompany groups of people who have small bells with them."

"I heard the Messenger of Allah say: 'The angels do not enter a house in which there is a small bell, or a bell, and the angels do not accompany groups of people who have bells with them.'"