In Islam, "the promise and threat" (waʿd wa-waʿīd) of Judgment Day (Yawm al-qiyāmah or Yawm ad-din), when "all bodies will be resurrected" from the dead, and "all persons" are "called to account" for their deeds and their faith during their life on earth. It has been called "the dominant message" of the holy book of Islam, the Quran, and resurrection and judgement the two themes "central to the understanding of Islamic eschatology". Judgement Day is considered a fundamental tenet of faith by all Muslims, and one of the six articles of Islamic faith. The trials, tribulations and details associated with it are detailed in the Quran and the hadith (sayings of Muhammad); these have been elaborated on in creeds, Quranic commentaries (tafsịrs), theological writing, eschatological manuals to provide more details and a sequence of events on the Day. Islamic expositors and scholarly authorities who have explained the subject in detail include al-Ghazali, Ibn Kathir, Ibn Majah, Muhammad al-Bukhari, and Ibn Khuzaymah. Among the names of the Day of Resurrection/Judgement used in the Qur'an are: al-Qari'ah—the Calamity; ( ٱلۡقَارِعَةُ ), Surah 101 is named al-Qari'ah; the word is found in Q.69:4, 101:1, 101:2, 101:3 al-Zalzalah—the Earthquake; ( الزَّلْزَلَة) Surah 99 is name al-Zalzalah; the word is found in Q.99.1 al-Sa'iqah—the Blast; Yawm an Thaqila—the Hard Day; Al-Yawm al-Muhit—the Encompassing Day; Yawm al-Fasl—the Day of Separation; al-Tammah al-Kubra—the Great Disaster; al-Haqqah—the Reality; Yawm al-Din—the Day of Judgement; Yawm al-Haqq—the True (inevitable) Day; Yawm al-Ḥisāb—the Day of Reckoning; Yawm al-Khuruj—the Day of Exodus (from the graves); as-sa’a—the [Last] Hour (ٱلسَّاعَةُ) is reportedly mentioned 39 times in the Qur’an (54:46, 25:11, 33:63, 30:55, 45:32, 69:2, 79:42, 30:12, 54:1, 43:66, 21:49, 30:14, 22:1, 22:7, 20:15, 40:59, 43:61, 42:17, 12:107, 15:85, 18:36, 45:27, 22:55, 43:85, 47:18, 6:40, 40:46, 42:18, 6:31, 16:77, etc.