Musannaf Ibn Abi Shaybah 2064 — The fitrah: what is counted in it

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "Ten things are part of the fitrah (natural disposition): trimming the moustache, letting the beard grow, using the tooth-stick (siwak), cleaning the nose with water, cutting the nails, washing the finger joints, plucking the armpit hair, removing the pubic hair, and cleaning oneself with water after relieving oneself (istinja)." The narrator Mus'ab said: I have forgotten the tenth trait; most probably it was rinsing the mouth.