Answer
Musa al-Kazim (c. 745 – 799) was the seventh Imam of Shia Islam, who succeeded his father, Jafar al-Sadiq, in 765 CE. He was a leading scholar of his time, and his teachings have been compiled in the book, Kitab al-Kafi. He was also known for his piety and asceticism, and he is considered to be one of the most important figures in Shia Islam.