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
← Previous Hadith "The Messenger of Allah came to us and asked us for water for ablution. I brought water to him and he rinsed his mouth and sniffed water up into his nostrils from one handful."

Sunan Ibn Majah Book 1, Hadith 139 Next Hadith → "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.'"

Sunan Ibn Majah Book 1, Hadith 141