Sūra Yā-Sīn (Arabic: سورَة یس) is the thirty sixth surah of the Qur'an. It is a Makki Sura in the juz' twenty second and twenty third of the Qur'an. The sura is called so because it begins with disjoined letters (muqatta'at): "Ya" (ی) and "Sin" (س). According to hadiths, Sura Yasin is one of the most virtuous suras of the Qur'an such that it is referred to as the "Heart of the Qur'an". Surah Yasin is concerned with the three principles of monotheism, prophethood, and resurrection, as well as the revival of the dead and the members of the body talking on the Day of Judgment. The stories of "Ashab al-Qarya" (people of the village) and the believer of Al Yasin occur in this sura. Many virtues are cited for the recitation of Sura Yasin in hadiths. For example, Imam al-Sadiq (a) is quoted as saying that if one recites this surah before going to sleep or before the sunset, he will be protected over the day and will be full of livelihood, and if one recites it at night before going to sleep, God will appoint thousand angels to repel devils from him and protect him against any harms. This Surah Yasin is recited by Abdul Basit, Mohamed Siddiq El-Minshawi, Abu Bakr al-Shatri and Saad al-Ghamdi, in their beautiful voices.