(8) باب الإِيتَارِ فِي الاِسْتِنْثَارِ وَالاِسْتِجْمَارِ
Abu Huraira reported:
The Messenger of Allah (way peace he upon him) said: When anyone performs ablution he must clean his nose and when anyone wipes himself with pebbles (after answering the call of nature) he must do that odd number of times.
Reference: Sahih Muslim 237c
In-book reference: Book 2, Hadith 29
USC-MSA web (English) reference(deprecated numbering scheme): Book 2, Hadith 460