Al -Kamil in the weak of men is one of the most important books of the Sunnis and the community in the wound, the amendment and the science of men. In the translation of every narrator, the scholars deny it from the hadiths or what they are strange or denied. Ibn Uday's book is one of the widest books classified in the weak, and one of the most composed in this field; Whereas, he has exceeded other books on this topic, such as the book of the wounded by Ibn Hibban, and the book of the great weak of Aqili.