It was narrated that Abu Hurairah said:"The Messenger of Allah said: 'I am to you like a father to his son, and I teach you. So when you go to relieve yourselves, do not face the Qiblah or turn your backs towards it.' He ordered us to use three pebbles, and he forbade us to use dung and bones, and he forbade cleaning oneself with the right hand

English translation · Sunan Ibn Majah