What is the difference between the grade of a Hadith and the types of Hadith, and what is meant by Sahih, Da'if, Hasan, Hasan Sahih, Mutawatir, Mursal, Ahad, Mashhur, Mawdu', Marfu', Mudallas, and Isnaduhu Sahih Hadith, and what is the difference between the Matn and the Sanad?

Regarding its transmission to us, Hadith is divided into: 1. Mutawatir: What has been narrated by a large number of people whom custom deems impossible to conspire upon a lie. It is entirely accepted and does not require investigation of its narrators. 2. Ahad: What does not meet the conditions of Mutawatir. It is divided, in terms of the number of its narrators, into: Mashhur (Well-Known): Narrated by three or more in every generation, but it has not reached the level of Mutawatir. Aziz (Strong/Rare): Its narrators are not fewer than two in any generation. Gharib (Strange/Solitary): Only one narrator is unique in its narration.

The Ahad Hadith, with its two main categories, is divided into: Maqbul (Accepted): What is preponderant in the truthfulness of the narrator, and its types are: Sahih li-dhatihi (Authentic in itself): Its chain of narration is continuous, transmitted by a just and precise narrator from one like him, up to its end, without any anomaly (shudhudh) or defect (illah). Hasan li-dhatihi (Good in itself): Its chain of narration is continuous, transmitted by a just narrator whose precision is less perfect, from one like him, up to its end, without any anomaly (shudhudh) or defect (illah). Sahih li-ghayrihi (Authentic due to external corroboration): A Hasan li-dhatihi Hadith if narrated through another chain of narration that is similar or stronger than it. Hasan li-ghayrihi (Good due to external corroboration): A weak Hadith if its chains of narration are multiple and the reason for its weakness is not the narrator's immorality or lying. If a Hadith is described as "Hasan Sahih," it either has two or more chains of narration (Hasan by one chain and Sahih by another), or it has one chain of narration (Hasan according to some, Sahih according to others). Mardud (Rejected): What is not preponderant in the truthfulness of the narrator due to the absence of one or more conditions for acceptance. Its general name is Da'if (Weak), which is what does not possess the quality of Hasan. Mawdu' (Fabricated) is the invented and fabricated Hadith falsely attributed to the Prophet, peace and blessings be upon him, and it is the worst type of weak Hadith.

Other terms: Mursal: What has a missing narrator at the end of its chain after the Tabi'i (e.g., when a Tabi'i says: "The Messenger of Allah, peace and blessings be upon him, said"). Marfu': What is attributed to the Prophet, peace and blessings be upon him, whether it is a saying, an action, an approval, or a description, regardless of whether it was attributed by a Companion or someone else. Sahih al-Isnad/Hasan al-Isnad (Authentic in Chain/Good in Chain): A lower rank than saying "Sahih/Hasan," because the authenticity of the chain may not mean the soundness of the text from anomaly (shudhudh) or defect (illah). Sanad (Chain of Narration): The series of narrators that leads to the text. Matn (Text): The words at the end of the chain of narration.