Abu Dawud Book 1, Hadith Number 37.
Chapter : Things with which cleansing after easing oneself is forbidden.
Narated By N/A : This tradition has also been narrated by Abu Salim al-J’Aishani on the authority of ‘Abd Allah b. Amr. He narrated this tradition at the time when he besieged the fort at the gate of Alyun.
Abu Dawud said: The fort of Alyun lies at the mountain in Fustat. Abu Dawud said: The kunyah (surname) of Shaiban b. Ummayyah is Abu Hudhaifah.