4:21 And Solomon reigned over all kingdoms from the {g} river unto the land of the Philistines, and unto the border of Egypt: they brought presents, and served Solomon all the days of his life.
(g) Which is the Euphrates.
4:21 The river - Euphrates: for so far David, having conquered the Syrians, extended his empire, which Solomon also maintained in that extent. And so God's promise concerning the giving the whole land, as far as Euphrates, to the Israelites, was fulfilled. And, if the Israelites had multiplied so much that the land of Canaan would not suffice them, having God's grant of all the land as far as Euphrates, they might have seized upon it whensoever occasion required. The land of the Philistines - Which is to be understood inclusively; for the Philistines were within Solomon's dominion. The border of Egypt - Unto the river Sihor, which was the border between Egypt and Canaan. And served - By tribute, or other ways, as he needed and required.
4:20-28 Never did the crown of Israel shine so bright, as when Solomon wore it. He had peace on all sides. Herein, his kingdom was a type of the Messiah's; for to Him it is promised that he shall have the heathen for his inheritance, and that princes shall worship him. The spiritual peace, and joy, and holy security, of all the faithful subjects of the Lord Jesus, were typified by that of Israel. The kingdom of God is not, as Solomon's was, meat and drink, but, what is infinitely better, righteousness, and peace, and joy in the Holy Ghost. The vast number of his attendants, and the great resort to him, are shown by the provision daily made. Herein Christ far outdoes Solomon, that he feeds all his subjects, not with the bread that perishes, but with that which endures to eternal life.
