Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him): The Messenger of Allah (peace and blessings be upon him) said: "I am to you as a father is to his children; I teach you. Therefore, when relieving yourselves, do not face the Qiblah nor turn your back towards it, and when you perform istinja (cleaning), do not use your right hand." And the Prophet (peace and blessings be upon him) used to command us to use three stones and forbid us from using dung or bones. Zakariya said: By «الرمة» is meant old bones.