Al -Kafi in the jurisprudence of the people of Medina is a book in the brief Maliki jurisprudence, composed by Al -Hafiz Yusuf bin Abdullah bin Muhammad bin Abdul Bar Al -Nimri Al -Qurtubi Abu Omar, one of the most prominent jurisprudential books, and therefore it is widely circulated among students of science, as it is an important source in the jurisprudence of the people of Medina.