1. Christ, the servant of God, who came as the descendant of David. (Zech 3:8)
    Isa 11:1-2, Isa 42:1, Ezk 34:23, Jer 23:5, Lk 1:31-33

In the Old Testament, God promised to send His servant, Christ. (Zec 3:8)

Zec 3:8 Hear now, O Joshua the high priest, thou, and thy fellows that sit before thee: for they are men wondered at: for, behold, I will bring forth my servant the Branch.

The Old Testaments speak of the coming of Christ as the descendant of David. (Isa 11:1-2, Isa 42:1, Eze 34:23, Jer 23:5)

Isa 11:1 And there shall come forth a rod out of the stem of Jesse, and a Branch shall grow out of his roots:
2 And the spirit of the Lord shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the Lord;

Isa 42:1 Behold my servant, whom I uphold; mine elect, in whom my soul delighteth; I have put my spirit upon him: he shall bring forth judgment to the Gentiles.

Eze 34:23 And I will set up one shepherd over them, and he shall feed them, even my servant David; he shall feed them, and he shall be their shepherd.

Jer 23:5 Behold, the days come, saith the Lord, that I will raise unto David a righteous Branch, and a King shall reign and prosper, and shall execute judgment and justice in the earth.

The Christ who came as the descendant of David is Jesus. (Luke 1:31-33)

Luke 1:31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name Jesus.
32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David:
33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.