KJV: 25 Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began, 26 But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith: 27 To God only wise, be glory through Jesus Christ for ever. Amen.

NIV: 25 Now to him who is able to establish you in accordance with my gospel, the message I proclaim about Jesus Christ, in keeping with the revelation of the mystery hidden for long ages past, 26 but now revealed and made known through the prophetic writings by the command of the eternal God, so that all the Gentiles might come to the obedience that comes from faith— 27 to the only wise God be glory forever through Jesus Christ! Amen.

ESV: 25 Now to him who is able to strengthen you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery that was kept secret for long ages 26 but has now been disclosed and through the prophetic writings has been made known to all nations, according to the command of the eternal God, to bring about the obedience of faith— 27 to the only wise God be glory forevermore through Jesus Christ! Amen.

CSB: 25 Now to him who is able to strengthen you according to my gospel and the proclamation about Jesus Christ, according to the revelation of the mystery kept silent for long ages 26 but now revealed and made known through the prophetic Scriptures, according to the command of the eternal God to advance the obedience of faith among all the Gentiles— 27 to the only wise God, through Jesus Christ—to him be the glory forever! Amen

Explanation

These three verses are only given a C rating by UBS. It is bracketed by the NA Greek text, but the English translations do not footnote them or bracket them.