We must not overlook the fact that such national names as these, derived from and referring to a certain stage of life and civilisation, are preserved by the same nation, even when that stage has been long passed. We see this most clearly in the case of the Philistines, who lived chiefly in towns, and preserved not even a tradition to remind them of a former nomadic life. Yet their name Pelishtim is itself a reminiscence of this kind. Whether the name is to be combined with the Semitic (Ethiopic) palasha ‘to wander,’ as most of the Semitic philologists say,[132] or is to be explained from the Aryan, as others say; in either case it is a living witness and reminiscence of the nomadic stage of the Philistine people, at which they gave themselves this name. Similarly the Accadians still called themselves by that name, which means ‘Highlanders,’ long after they had chosen a new habitation in the plains.[133] The herdsman finds his happiness in the well-being of his herds; his wealth depends on the quality of the pasture which he can get for them; to seek this is the constant object of his endless wanderings. Good, fresh, sound pasture is the sum of his modest wishes: ‘green pastures beside still waters,’ as a Hebrew Psalmist (Ps. XXIII. 2) expresses it. The cloudy heaven, which sends rain to his fields, is in his eyes a most friendly element, to which he gladly gives the victory over the scorching glow of the sun, which dries up his pastures. The nomad calls himself ‘Son of the water of heaven,’ i.e. the rain. ‘By banû mâ al-samâ (Sons of Rain),’ says an Arabic commentator on Muslim’s collection of traditions, ‘the Arabs are to be understood.... For as the greater part of them are owners of herds, they supported themselves mainly by the goodness of the pastures.’[134] Thus this appellation ‘Sons of the water of heaven’ could then come to have the general meaning ‘rich people,’ as e.g. in a sensible verse of ʿAnbar b. Samâk:[135] falâ tathiḳan min-an-nauka bishayʾin walau kânû banî mâʿi-s-samâʿi: ‘Confide thou not in anything in fools, E'en were they _sons of water of the heaven_,’ i.e. however rich they might be. The Bedawî of Somali, Isa, call their Ogas, i.e. chief, by the name _Roblai_, which, according to Burton, denotes Prince of the Rain.[136] The nomad must be constantly wandering and seeking good pasture, if he is to gain a comfortable position. The glowing heat of the sun is in this respect his terrible enemy and continual adversary.