The former promise was for the stability, this for the multiplication of the church, which is here expressed under the notion of the seed of David, that is, the members of Christ: the Jews were ordinarily called the seed of Abraham, Isaac, and Jacob, but I do not remember they are any where called the seed of David, unless it be 1 Kings 11:39, where it seems also to be understood only of the princes that came from David; nor indeed could they be so called in any proper sense; David being no common head to the whole Jewish nation, as both Abraham, Isaac, and Jacob were; but Christ is often called the seed of David, 1 Thessalonians 7:42 Acts 13:23 Romans 1:3 2 Timothy 2:8; and Christ is himself called David, whose seed and whose Levites are multiplied in the multiplying of Christians and of faithful ministers under the gospel, which certainly are the things here promised.
Related Commentaries of Jeremiah 33:22
Jeremiah 33:22
22 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.