It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "Whoever performs ablution should sniff water into his nose, and whoever uses pebbles (for cleaning) should use an odd number."

Imam Malik, may Allah have mercy on him, says that if a person takes a handful of water and uses it both for rinsing the mouth and for sniffing into the nose, there is no harm in it.