337 – Al-Haytham ibn Khārijah narrated to us; al-Haytham ibn ʿImrān narrated to us; I heard Ismāʿīl ibn ʿUbayd Allāh say:

“ʿAbd al-Malik ibn Marwān instructed me to keep his sons away from fatty foods, not to give them any meal until they had gone outside to relieve themselves, and to guard them from lying—even if that should call for a measure of sternness.”