Sunan Ibn Majah Book 1, Hadith 141

"I said: 'O Messenger of Allah! Tell me about ablution.' He said: 'Perform ablution properly and sniff water up into your nostrils, thoroughly, unless you are fasting.'"

Previous Hadith

The Messenger of Allah said to me: 'When you perform ablution, clean your nose, and when you use pebbles to clean yourself after defecating, use an odd number.'"

Sunan Ibn Majah Book 1, Hadith 140
Next Hadith

'Sniff up water into the nostrils thoroughly, two or three times.'"

Sunan Ibn Majah Book 1, Hadith 142