Dominion — From one sea to another, or in all the parts of the habitable world. This was accomplished in Christ, and in him only. The river — Euphrates: which was the eastern border of the kingdom of Canaan, allotted by God, but enjoyed only by David, Solomon, and Christ. Of whose kingdom this may be mentioned, as one of the borders; because the kingdom of Christ is described under the shadow of Solomon's kingdom.
Related Commentaries of Psalms 72:8
Psalms 72:8
8 He shall have dominion also from sea to sea, and from the river unto the ends of the earth.