A LONG time ago... the kingdom of Israel is ancient. Solomon was one of the kings of that kingdom. I'm surprised that you don't know about these things.
Don't you even know that kingdom was not even existence in the first century and that explains why the Twelve asked the Lord Jesus if He was going to restore Israel at that time (Acts 1:6)?
Perhaps you actually think that the kingdom has already been restored to Israel?
Isaiah foretold of the gathering of this second believing remnant of which you are completely unaware.
Isa 11:11 KJV And it shall come to pass in that day, that the Lord shall set his hand again the second time to recover the remnant of his people, which shall be left, from Assyria, and from Egypt, and from Pathros, and from Cush, and from Elam, and from Shinar, and from Hamath, and from the islands of the sea.
Are you saying that happened in the first century because the your made-up ideas depend on the idea that there were two believing remnants out of Israel in the first century.
I have already demonstrated that all of the believers in the first century when Paul wrote his epistles were baptized into the Body of Christ but once again you refuse to believe it because you put more faith in what some people say about the Scriptures than you do in what they actually say.
Paul's epistle which is traditionally known as "the First Epistle to the Corinthians" was not just addressed to those of the church at Corinth but also to
"all that in every place call upon the name of Jesus Christ our Lord":
"Paul, called to be an apostle of Jesus Christ through the will of God, and Sosthenes our brother, Unto the church of God which is at Corinth, to them that are sanctified in Christ Jesus, called to be saints, with all that in every place call upon the name of Jesus Christ our Lord, both theirs and ours" (1 Cor.1:1-2).
The words found in this epistle are addressed to every single believer who lived at the time when it was written. John Nelson Darby, known as the father of modern dispensationalism, understood that to be true, writing the following:
"He addresses the assembly of God at Corinth, adding a character (the application of which is evident when we consider the contents of the epistle) 'sanctified in Christ Jesus.' Afterwards the universality of the application of the doctrine and instructions of the epistle, and of its authority over all Christians, wherever they might be, is brought forward in this address" (John Nelson Darby, Commentary at 1 Corinthians 1:2).
With these things in mind, we can understand what Paul said later in the same epistle applied to every single believer when the epistle was written:
"For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also is Christ. For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit" (1 Cor.12:13).
When Paul used the words "are we ALL baptized into one Body" that can only mean that the Twelve were included and therefore they are members of the Body of Christ. But you would rather deny Paul's words and then tell everyone who will listen that even though there are 21 epistles which contain doctrine for the Body of Christ you say that there are only 13 which do!