1-78 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Ahmad ibn Idris quoted on the authority of Muhammad ibn Abil Sahban, on the authority of Muhammad ibn Abi Umayr, on the authority of Jamil ibn Salih, on the authority of Muhammad ibn Marvan who narrated that Aba Abdullah as-Sadiq (MGB) told him, “O Muhammad! My father said, ‘O my son! God has not created anything more delightful than concealing of faith for your father.’”