Narrated Abu Hurairah (RAA): Allah's Messenger (Peace be upon him) said: "There is Janabah (trace of sexual impurity) under every hair, so wash your hair and cleanse the skin." Abu Dawud and at-Tirmidhi transmitted it but they declared it to be weak. Ahmad transmitted a similar narration to the above, on the authority of `A'ishah (RAA), but this version has an unknown transmitter.