Imam Al -Hafiz Al -Kabir Abu Al -Hassan Ali bin Abdullah bin Jaafar Al -Saadi, famous for "Ibn al -Madini", is a special attention and uniqueness in the chapter on knowing the ills of the hadiths. And it is classified as one of the best works in his door; Al -Hafiz Imad Al -Din Ibn Katheer said: "And from the best book that was placed in that - meaning in the ills of the hadiths - and its sake and its vigor" The Book of Illness "by Ali bin Al -Madini Sheikh Al -Bukhari, and all other speakers after him in this regard in particular.