Kamāl al-Dīn wa Tamām al-Niʿma (Arabic:کَمالُ الدّين و تَمام النِعمَة) Ikmāl al-Din wa Itmām al-Niʿma (إِکمالُ الدّين و إِتمامُ النِعمَة), written by the great Shi'a scholar, Muhammad b. Ali b. Bābiwayh al-Qummi known as Sheikh al-Ṣaduq (d. 381/991-2), discusses the issue of occultation and the advent of Imam al-Mahdi (a). In this two volumes book, Sheikh al-Ṣaduq has mentioned many examples of the absences of the prophets (a) and has fully discussed the imamate of Imam al-Mahdi (pbuh), his birth, narrations of the Prophet and Imams about the advent of Imam al-Mahdi, those who have met him and the situation after his coming.
