His royal court was so large because he ruled over all the kingdoms west of the Euphrates River from Tiphsah to Gaza; he was at peace with all his neighbors.
( 5: 1) Solomon ruled all the kingdoms from the Euphrates River to the land of the Philistines, as far as the border of Egypt. These kingdoms paid tribute as Solomon’s subjects throughout his lifetime.
I will set your boundaries from the Red Sea to the sea of the Philistines, and from the desert to the River, for I will deliver the inhabitants of the land into your hand, and you will drive them out before you.