Mukhtasar Muslim (Abridged) 115 — Using odd number of stones

It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: When any of you cleans the place of excretion with stones, he should clean it with an odd number of stones, and when any of you performs ablution, he should put water into his nose and then blow it out.