But now Christ has been raised from the dead, the firstfruits of those who have fallen asleep.
References for 1 Corinthians 15:20
For since death came through a man, the resurrection of the dead also comes through a man.
For just as in Adam all die, so also in Christ all will be made alive.
But each in his own order: Christ, the firstfruits; afterward, at His coming, the people of Christ.
Then comes the end, when He hands over the kingdom to God the Father, when He abolishes all rule and all authority and power.
For He must reign until He puts all His enemies under His feet.
References for 1 Corinthians 15:25
The last enemy to be abolished is death.
For He has put everything under His feet. But when it says "everything" is put under Him, it is obvious that He who puts everything under Him is the exception.
References for 1 Corinthians 15:27
And when everything is subject to Him, then the Son Himself will also be subject to Him who subjected everything to Him, so that God may be all in all.