Abū Jaʿfar Muḥammad ibn Yaʿqūb ibn Isḥāq al-Kulaynī ar-Rāzī (محمد بن یعقوب بن اسحاق کلینی رازی; أَبُو جَعْفَرٍ مُحَمَّدُ بْنُ يَعْقُوبَ بْنِ إِسْحَاقَ ٱلْكُلَيْنِيُّ ٱلرَّازِيُّ; c. 255 AH / 868 CE – 329 AH / 941 CE) was a Persian Shia Muslim scholar, hadith compiler, and the author of Kitāb al-Kāfī.
He was known for his extensive travels in search of hadith, particularly in Qom and Baghdad, and received his education under numerous teachers, many of whom were contemporaries of the tenth and eleventh Shia Imams, Ali al-Hadi (835–868) and Hasan al-Askari (868–874). He was also a teacher of several prominent scholars, including Shaykh al-Saduq and Ibn Qulawayh.
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