Matthew Henry on 1 Kings 4:20-28
Such a kingdom, and such a court, surely never any prince had, as Solomon's are here described to be.
I. Such a kingdom. Never did the crown of Israel shine so brightly as it did when Solomon wore it, never in his father's days, never in the days of any of his successors; nor was that kingdom ever so glorious a type of the kingdom of the Messiah as it was then. The account here given of it is such as fully answers the prophecies which we have concerning it in Ps. 72, which is a psalm for Solomon, but with reference to Christ. 1. The territories of his kingdom were large and its tributaries many; so it was foretold that he should have dominion from sea to sea, Psa 72:8-11. Solomon reigned not…
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Solomon reigned over all kingdoms from the river--All the petty kingdoms between the Euphrates and the Mediterranean were tributary to him. Similar is the statement in Kg1 4:24.
Adam Clarke on 1 Kings 4:21
Solomon reigned over all kingdoms - The meaning of this verse appears to be, that Solomon reigned over all the provinces from the river Euphrates to the land of the Philistines, even to the frontiers of Egypt. The Euphrates was on the east of Solomon's dominions; the Philistines were westward on the Mediterranean sea; and Egypt was on the south. Solomon had, therefore, as tributaries, the kingdoms of Syria, Damascus, Moab, and Ammon, which lay between the Euphrates and the Mediterranean. See Calmet. Thus he appears to have possessed all the land that God covenanted with Abraham to give to his posterity.
John Gill on 1 Kings 4:21
And Solomon reigned over all kingdoms,.... Not only over Judah and Israel, but all people round about him, they standing in fear of him; or who brought him presents, or paid tribute to him, which was an acknowledgment of superiority over them, and doing homage to him:
from the river unto the land of the Philistines, and unto the border of Egypt; that is, from the river Euphrates, as the Targum, which was the border of his proper domains to the east, to Palestine, inhabited by the Philistines, which lay to the west, and as far as the border of Egypt, which was the southern boundary; a like and larger extent of Christ's kingdom is given, Psalm 72:8;
and they brought presents, and served Solo…