As the host of heaven cannot be numbered, neither the sand of the sea measured: so will I multiply the seed of David my servant, and the Levites that minister unto me.
As the host of heaven cannot be numbered - (Genesis 15:5; Genesis 22:17). The blessings there promised belonged to all the tribes; here it is restricted to the family of David and the tribe of Levi, because it was on these that the welfare of the whole people rested. When the kingdom and priesthood flourish in the person of Messiah, the whole nation shall temporally and spiritually prosper.