Ibn Abi Hatim argued for the necessity of the science of rijal by saying that because we have received the Tradition through and transmission, we have to distinguish the hadith transmitters from the unreliable ones.
Ilmu hadits dirayah adalah ilmu yang diketahuinya hakikat riwayat, syarat-syaratnya, hukum-hukumnya, keadaan perawi dan syarat-syarat mereka, maacam-macam apa yang diriwayatkan dan, apa yang berkaitan dengannya.
Sesul De Sus 18 Jud.
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The work is considered a rijali work because Abu Ghalib mentioned the hadith transmitters associated with the family of A'yan and also provided a list of the books together with their authors which he had the permission to narrate.
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