That He will reign as a King for ever
In Zechariah: “Tell the daughter of Zion, Behold, your King comes unto you: just, and having salvation; meek, sitting upon an as that has not been tamed.” Also in Isaiah: “Who will declare to you that eternal place? He that walks in righteousness, and holds back his hands from gifts; stopping his ears. that he may not hear the judgment of blood; and closing his eyes, that he may not see unrighteousness: this man shall dwell in the lofty cavern of the strong rock; bread shall be given him, and his water shall be sure.
You shall see the King with glory.” Likewise in Malachi: “I am a great King, says the Lord, and my name is illustrious among the nations.” Also in the second Psalm: “But I am established as a King by Him upon His holy hill of Zion, announcing His empire.” Also in the twenty-first Psalm: “All the ends of the world shall be reminded, and shall turn to the Lord: and all the countries of the nations shall worship in Your sight. For the kingdom is the Lord's: and He shall rule over all nations.” Also in the twenty-third Psalm: “Lift up your gates, you princes; and be lifted up, you everlasting doors; and the King of glory shall come in.
Who is this King of glory? The Lord strong and mighty, the Lord strong in battle. Lift up your gates, O you princes; and be lifted up, you everlasting doors; and the King of glory shall come in. Who is this King of glory? The Lord of hosts, He is the King of glory.” Also in the forty-fourth Psalm: “My heart has breathed forth a good discourse: I tell my works to the king: my tongue is the pen of a writer intelligently writing. You are lovely in beauty above the children of men: grace is shed forth on Your lips, because God has blessed You for ever.
Be girt with Your sword on Your thigh, O most mighty. To Your honour and to Your beauty both attend, and direct Yourself, and reign, because of truth, and meekness, and righteousness.” Also in the fifth Psalm: “My King, and my God, because unto You will I pray. O Lord, in the morning You shall hear my voice; in the morning I will stand before You, and will contemplate You.” Also in the ninety-sixth Psalm: “The Lord has reigned; let the earth rejoice; let the many isles be glad.” Moreover, in the forty-fourth Psalm: “The queen stood at your right hand in a golden garment; she is clothed in many colours.
Hear, O daughter, and see, and incline your ear, and forget your people and your father's house; for the King has desired your beauty, for He is your Lord God.” Also in the seventy-third Psalm: “But God is our King before the world; He has wrought salvation in the midst of the earth.” Also in the Gospel according to Matthew: “And when Jesus was born in Bethlehem of Judah in the days of Herod the king, behold, Magi from the east came to Jerusalem, saying, Where is He who is born King of the Jews?
For we have seen His star in the east, and have come to worship Him.” Also, according to John, Jesus said: “My kingdom is not of this world. If my kingdom were of this world, my servants would be in trouble, that I should not be delivered to the Jews; but now is my kingdom not from hence. Pilate said, Are you a king, then? Jesus answered, You say that I am a king. For this cause I was born, and for this cause I have come into the world, that I might bear testimony to the truth. Every one that is of the truth hears my voice.”
Source: The Treatises of Cyprian (New Advent)