Jehovah God does not need to make a new Kingdom covenant personally with Jesus for him to come into David’s throne, for Jesus came into the ancient kingdom covenant that God made with David naturally, that is, by human birth. Thus he becomes Permanent Heir to David’s kingdom. But God’s oath concerning a priest forever like Melchizedek is something different. It is a covenant for a heavenly kingdom. It is a personal Kingdom covenant, made only with Jesus Christ. Thus those two covenants concerning kingdom did not apply to the nation of Israel or to Christ’s disciples, but only to Jesus Christ himself. On the other hand, the new covenant is made through a mediator, Jesus Christ, with his 144,000 disciples. This new covenant with the “holy nation” of spiritual Israelites is what brings forth the “kingdom of priests,” to serve under Jesus Christ, the King-Priest like Melchizedek. Hence Jesus appointed a kingdom to his disciples in Luke 22:28-30. Hence we must distinguish between the Kingdom covenants that apply to the one person, Jesus Christ, and the new covenant that applies to the nation of spiritual Israel. Jesus Christ became a King-Priest in heaven by Jehovah God’s oath, not by virtue of the new covenant.