The New Testament tells us that Jesus Christ is the King promised by the Old Testament prophets. He will rule over the Kingdom of God for ever on David’s throne.
Mary the mother of Jesus Christ is told that he is the one who will eventually sit for ever on David’s throne in Israel:
32 He will be great and will be called the Son of the Most High. The Lord God will give him the throne of his father David, 33 and he will reign over the house of Jacob forever. There will be no end to his Kingdom.”
Jesus says that those who work iniquity will be excluded when the Kingdom of God comes:
27 He will say, ‘I tell you, I don’t know where you come from. Depart from me, all you workers of iniquity.’ 28 There will be weeping and gnashing of teeth when you see Abraham, Isaac, Jacob, and all the prophets in God’s Kingdom, and yourselves being thrown outside.
After his resurrection, the disciples ask if Jesus will start this Kingdom at this time. Jesus says that God will decide when that happens:
6 Therefore when they had come together, they asked him, “Lord, are you now restoring the kingdom to Israel?”
7 He said to them, “It isn’t for you to know times or seasons which the Father has set within his own authority.
The apostle Paul summarises the future hope of the Kingdom:
22 For as in Adam all die, so also in Christ all will be made alive. 23 But each in his own order: Christ the first fruits, then those who are Christ’s, at his coming. 24 Then the end comes, when he will deliver up the Kingdom to God, even the Father, when he will have abolished all rule and all authority and power. 25 For he must reign until he has put all his enemies under his feet. 26 The last enemy that will be abolished is death.
Peter tells his readers that they will be in the Kingdom if they are diligent in making their calling and election sure:
10 Therefore, brothers, be more diligent to make your calling and election sure. For if you do these things, you will never stumble. 11 For thus you will be richly supplied with the entrance into the eternal Kingdom of our Lord and Saviour, Jesus Christ.