Musannaf Ibn Abi Shaybah 2066 — The fitrah: what is counted in it

Sayyiduna Ammar bin Yasir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "The traits of the fitrah are these: rinsing the mouth, cleaning the nose, using the tooth-stick (siwak), trimming the moustache, plucking the armpit hair, washing the finger joints, clipping the nails, cleaning oneself with water after relieving oneself (istinja), and circumcision."