question #1 Sahih al-Bukhari 161, Book 4, Hadith 27 : What is the significance of using an odd number of stones for cleaning oneself in Islamic practice?

The Prophet (ﷺ) said, “Whoever performs ablution should clean his nose with water by putting the water
in it and then blowing it out, and whoever cleans his private parts with stones should do it with odd
number of stones.”