It was narrated that Salman said, that a man said to him: “Your companion (meaning, the Prophet صلی اللہ علیہ وآلہ وسلم even teaches you how to go to the toilet!” He said: “Yes, he forbade us from facing the Qiblah when defecating or urinating, or cleaning ourselves with our right hands, or to use less than three stones.” (Sahih)