; , 22; and . Harold Fisch argued that the command of and to hand on from one generation to another the Exodus story provided the prototype for the ghost's admonition to Prince Hamlet, "Remember me", in of William Shakespeare's play Hamlet. Gunther Plaut reported that scholars generally agree that the term "Hebrew" (, Ivri), as in , came from the name of a group called Habiru or Apiru, people who had lost their status in the community from which they came, and who were not necessarily related except by common fate. Plaut wrote that the Habiru were a class of people who lived in the Fertile Crescent during the 19th to 14th centuries B.C.E. who may originally have come from Arabia, became prominent in Mesopotamia, and later spread to Egypt. The Habiru followed distinct occupations, particularly mercenaries and administrators. Although at first they were nomads or seminomads, they later settled. They were usually considered foreigners, maintaining their group identity. The term Habiru referred not so much to an ethnic or linguistic group as to a social or political group. Plaut reported that the words Habiru and "Hebrew" (, Ivri) appear to share a common linguistic root. Plaut concluded that Israelites in Egypt likely occupied positions similar to, or because of familial ties were identified with, the Habiru. When non-Israelites repeatedly applied the term to the Israelites, the Israelites themselves began to use the name Habiru, which they pronounced Ivri. Plaut considered it possible that for some time the term Ivri was used only when the Israelites spoke of themselves to outsiders and when outsiders referred to them. Thus calls Abram Ivri vis-a-vis an outsider, and Jonah says, "I am an Ivri," when asked his identity by non-Israelite sailors in , but otherwise Israelites referred to themselves by their tribes (for example, Judah or Ephraim) or by their common ancestor, Israel. Shlomo Ephraim Luntschitz (The Kli Yakar) noted that in , Moses told Pharaoh that the locusts would invade, "your houses . . . , and the houses of all your servants, and the houses of all the Egyptians," in that order. Arguing that the Pharaoh's palace was surely the most insulated, the Kli Yakar taught that the order of the locust invasion was another miracle, so that the punishment would come in the order that the sin was committed, first with Pharaoh (who was most guilty), then with his