Yahya ibn Yahya narrated to us, saying: I read before Malik, from Ibn Shihab, from Abu Idris al-Khawlani, from Abu Hurayrah, that the Messenger of Allah, peace and blessings be upon him, said: "Whoever performs ablution, let him snuff water into his nose and then blow it out, and whoever cleans himself with stones, let him do so with an odd number."