Mukhtasar Muslim (Abridged) 116 — Cleaning with stones and prohibition

Saidna Salman (may Allah be pleased with him) says that he was asked, "Did your Noble Prophet (peace and blessings be upon him) teach you everything, even the matters of defecation and urination?" He replied, "Yes. The Prophet (peace and blessings be upon him) forbade us from facing the Qiblah while urinating or defecating, and also forbade us from cleaning ourselves with the right hand, or with less than three stones, or with dung or bones."