1 Kings 4:21

And Solomon reigned. — His dominion is described as extending on the south to the land of the Philistines and the border of Egypt, including what we call Arabia (see Psalms 72:10, and comp. 1 Kings 10:15); on the east to “the river” Euphrates, as far north as Tiphsah (the Greek Thapsacus); on the west it would, of course, be bounded by the sea; and on the north it extended far beyond Damascus, probably up to the borders of the Assyrian Empire. It seems also clear that the Syrian Kingdoms (like the kingdom of Tyre), were allies on a footing of some dependence, though not exactly tributaries. This extension of dominion was the fruit of the warlike energy of the two preceding reigns. As in all ancient Eastern empires, it represented, not an organised monarchy, but the supremacy of a dominant kingdom’ over tributaries gathered round — “the kings on this side the river” who “brought presents” — apparently at that time numerous, and ruling over small territories. Such an empire would rise rapidly, and as rapidly fall to pieces; and in Solomon’s case it was sustained less by military power than by the peaceful forces of wealth and policy, and was largely dependent on his own personal ascendancy.