Omen
An omen (also called portent) is a phenomenon that is believed to foretell the future, often signifying the advent of change. It was commonly believed in ancient times, and still believed by some today, that omens bring divine messages from the gods. These omens include natural phenomena, for example an eclipse, abnormal births of animals (especially humans) and behaviour of the sacrificial lamb on its way to the slaughter. Specialists, known as diviners, variously existed to interpret these omens. They would also use an artificial method, for example, a clay model of a sheep liver, to communicate with their gods in times of crisis. They would expect a binary answer, either yes or no, favourable or unfavourable. They did these to predict what would happen in the future and to take action to avoid disaster. Though the word omen is usually devoid of reference to the change's nature, hence being possibly either "good" or "bad", the term is more often used in a foreboding sense, as with the word ominous. The word comes from its Latin equivalent omen, of otherwise uncertain origin. The oldest source for this practice in the Ancient Near East came from Mesopotamian practice attested at the first half of the 2nd millennium BC. It was vigorously pursued by the Assyrian kings, Esarhaddon and his son, Ashurbanipal in the 7th century BC. Omens were interpreted by several methods—e.g., liver divination, lecanomancy, and libanomancy. Hepatoscopy—observing irregularities and abnormalities of the entrails of a sacrificial sheep—was used in many royal services. Astrological omens were popular in Assyria in the 7th century BC. Diviners gained influence by interpreting omens and advising the king, Esarhaddon (681–669 BC), how to avoid some terrible fate. Sometimes the Assyrian king hid for a while after he put a substitute king on the throne. The court expected that the substitute king would take the evil consequences of an omen. When they believed the danger was over, they executed the substitute king and the true king resumed the throne.