Al-Adab Al-Mufrad #1291

Anas said, "While the Prophet, may Allah bless him and grant him peace, was with one of his wives, a man passed by and the Prophet, may Allah bless him and grant him peace, called him and said, 'So-and-so, this is my wife so-and-so.' The man said, 'Whoever I might suspect, I would not suspect you!' The Prophet said, 'Shaytan flows in the son of Adam like blood flows.'"