It was narrated that ‘Aishah said: “The Prophet P.B.U.H went out to urinate, and ‘Umar followed him with water. He said: ‘What is this, 0 ‘Umar?’ He said, ‘Water.’ He aid: ‘I have not been commanded perform ablution every time I urinate. If I did that it would have become a Sunnah.” (Da’if)