Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters?
-- I Corinthians 6:2
It shows that Paul knows nothing of The Twelve sitting on thrones and judging The Twelve Tribes of Israel. In fact he has completely replaced the idea by the logic of his missionary calling to make disciples of all nations, so that he can say to the Corinthians that they, the believers, will judge the world, the unbelievers. The Jewish apocalyptic nationalism of Jesus has been completely and utterly replaced, in keeping with Paul's idea that the church has replaced Israel. The church, the "Israel of God", is a "new creature" where nothing counts but being in Christ crucified (Galatians 6:14ff.).
And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel.
-- Matthew 19:28
And I appoint unto you a kingdom, as my Father hath appointed unto me; That ye may eat and drink at my table in my kingdom, and sit on thrones judging the twelve tribes of Israel.
-- Luke 22:29f.
The Corinthians in fact had gotten so high on the idea that they were kangs already that Paul must spill quite a bit of ink in I Corinthians 4 mocking their "reign".
Now ye are full, now ye are rich, ye have reigned as kings without us: and I would to God ye did reign, that we also might reign with you.
-- I Corinthians 4:8
Now where'd they get that idea?