Psalms 89:4

Thy Seed will I establish forever, namely, in his dynasty, in the rulers out of his line, and build up thy throne to all generations. Selah. If this had been spoken of an earthly, temporal rule only, then this prophecy would have fallen to the ground, for in no kingdom of this world is there at the present time any ruler of the house of David. But Christ, who is truly a King, although His kingdom is not of this world, is the Seed of David whose rule will last throughout eternity. It is with reference to this promise that the praise of the psalmist sounds forth again.