Snuffing Water in the Nose and Rinsing the Mouth

»'Aisha [ra] reported: The Messenger of Allah (peace and blessings be upon Him) said:

"Ten are the acts according to Fitrah (natural disposition): clipping the moustache, letting the beard grow, using the siwak (tooth-stick), snuffing water in the nose (and then expelling it), cutting the nails, washing the finger joints, plucking the hair under the armpits, shaving the pubes and cleaning one's private parts with water. The narrator said: I have forgotten the tenth, but it may have been rinsing the mouth." Qutaiba added: Waki' said: Cleaning one's private parts with water is istinja. «([1])

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([1]) Sahih Muslim – Kitab al-Tahara (162