17. God led them not through the way of the land of the Philistines, although that was near, &c.—The shortest and most direct route from Egypt to Palestine was the usual caravan road that leads by Belbeis, El-Arish, to Ascalon and Gaza. The Philistines, who then possessed the latter, would have been sure to dispute their passage, for between them and the Israelites there was a hereditary feud (1Ch 7:21, 22); and so early a commencement of hostilities would have discouraged or dismayed the unwarlike band which Moses led. Their faith was to be exercised and strengthened, and from the commencement of their travels we observe the same careful proportion of burdens and trials to their character and state, as the gracious Lord shows to His people still in that spiritual journey of which the former was typical.

     18. God led the people about, through the way of the wilderness of the Red Sea, &c.—This wondrous expanse of water is a gulf of the Indian ocean. It was called in Hebrew "the weedy sea," from the forest of marine plants with which it abounds. But the name of the Red Sea is not so easily traced. Some think it was given from its contiguity to the countries of Edom ("red"); others derive it from its coral rocks; while a third class ascribe the origin of the name to an extremely red appearance of the water in some parts, caused by a numberless multitude of very small mollusca. This sea, at its northern extremity, separates into two smaller inlets—the eastern called anciently the Elanitic gulf, now the gulf of Akaba; and the western the Heroopolite gulf, now the gulf of Suez, which, there can be no doubt, extended much more to the north anciently than it does now. It was toward the latter the Israelites marched.

     19. Moses took the bones of Joseph with him—in fulfilment of the oath he exacted from his brethren (Ge 50:25, 26). The remains of the other patriarchs (not noticed from their obscurity) were also carried out of Egypt (Ac 7:15, 16); and there would be no difficulty as to the means of conveyance—a few camels bearing these precious relics would give a true picture of Oriental customs, such as is still to be seen in the immense pilgrimages to Mecca.

     20. encamped in Etham—This place is supposed by the most intelligent travellers to be the modern Ajrud, where is a watering-place, and which is the third stage of the pilgrim-caravans to Mecca. "It is remarkable that either of the different routes eastward from Heliopolis, or southward from Heroopolis, equally admit of Ajrud being Etham. It is twelve miles northwest from Suez, and is literally on the edge of the desert" [Pictorial Bible].

     21, 22. the Lord went before them—by a visible token of His presence, the Shekinah, in a majestic cloud (Ps 78:14; Ne 9:12; 1Co 10:1), called "the angel of God" (Ex 14:19; 23:20-23; Ps 99:6, 7; Isa 63:8, 9).