Abu Huraira reported God’s messenger as saying, "I am to you just like a father to his son, for I give you instruction. When you go to relieve yourselves do not face or turn your back to the qibla.” He commanded that three stones be used, he forbade the use of dung and decayed bones, and he forbade that a man should cleanse himself with his right hand.
‘A'isha said, “God’s messenger used his right hand for his ablution water and his food, and his left hand for his evacuations and anything objectionable.”
One day when I was with the Prophet he wanted to pass water, so he went to some soft ground at the foot of a wall and did it, after which he said, "When any of you wishes to pass water, he should look for to do it in.”