The book of conviction is one of the books that specialized in a specific topic, which is the conviction, written by Al -Hafiz Ibn Al -Sunni (280 AH - 364 AH). Each chapter was placed in the title, and it was included under each title the texts that suit it, and the book included 71 texts, between the hadiths raised and the effects of the companions and the followers, including the correct ones, including the weak and verses of poetry.