١٢٨٩ (        ) ١٢٩١ ( Research Summary: The science of authentication is: one of the sciences branching out from the science of hadith. The sciences of hadith are many, and this is one of them, and it represents the practical aspect of the term Hadith. The authentication is: searching in the books of the Sunnah for the output of the

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... ith and knowing its state and the state of its narrators, and its ruling is valid and weak in the total of its methods, and in which book it is, and which part and page Our Imams in later eras sensed the student's need for means to help him quickly access the text in its sources, so they composed encyclopedias of Hadiths based on the letters of the dictionary, with attribution of these Hadiths, and other encyclopedias arranged on topics, and third on Hadith methods. The efforts continued in our time from many directions, Including weaving along the lines of the above, and writing encyclopedias on the previous methods, including the development of new methods, such as composing using a word of Hadith. This research is like foundations and rules for those who want to practice authentication and search for the Sunnah of the Prophet Muhammad (may God bless him and grant him peace). I collected it for every researcher who understands the rules of authentication, so that he can use these keys, and I have collected in it fourteen rules, which included important beneficial benefits. I started it with the qualities that the student should have, and I defined the authentication, and I differentiated between the word "authendicated" and the word "narrated" and other uses of the word of authentication, and the difference between it and the word extraction, then I mentioned the source of the hadith and its orbit, methods and types. Then I mentioned the types of authentication and talked about each type. And I mentioned an important rule, which is that the authentication is the origin of the hadith, even if its wording differs, then I showed the sources of the authentication and divided it into original and non-original and showed the abbreviated formulas of wording of Hadiths and divided them as well, with an explanation of the rule of arranging the sources, with the statement of release and restriction in attributing to the hadith, and the duty to produce the hadith about One or more companions, the formula for producing a weak and correct hadith.