New King James Version (NKJV)
1 John 5
20 And we know that the Son of God has come and has given us an understanding, that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.
21 Little children, keep yourselves from idols. Amen.
2 John 1
1 The Elder, To the elect lady and her children, whom I love in truth, and not only I, but also all those who have known the truth,
2 because of the truth which abides in us and will be with us forever:
3 Grace, mercy, and peace will be with you from God the Father and from the Lord Jesus Christ, the Son of the Father, in truth and love.
4 I rejoiced greatly that I have found some of your children walking in truth, as we received commandment from the Father.
5 And now I plead with you, lady, not as though I wrote a new commandment to you, but that which we have had from the beginning: that we love one another.
6 This is love, that we walk according to His commandments. This is the commandment, that as you have heard from the beginning, you should walk in it.
7 For many deceivers have gone out into the world who do not confess Jesus Christ as coming in the flesh. This is a deceiver and an antichrist.
8 Look to yourselves, that we may receive a full reward.
9 Whoever transgresses and does not abide in the doctrine of Christ does not have God. He who abides in the doctrine of Christ has both the Father and the Son.