Galatians 1:9
As we said before, and now I say again, if anyone is proclaiming a gospel [to] you contrary to what you have received, let him be accursed!
Deuteronomy 4:2
You must not add to the word that I [am] commanding you, and you shall not take away from it [in order] to keep the commands of Yahweh your God that I [am] commanding you [to observe].
Deuteronomy 12:32-11
All of the things that I [am] commanding you, {you must diligently observe}; you shall not add to it, and you shall not take away from it."
Proverbs 30:6
Do not add to his words lest he rebuke you and you be found a liar.
Romans 16:17
Now I exhort you, brothers, to look out for those who cause dissensions and temptations contrary to the teaching which you learned, and stay away from them.
2 Corinthians 1:17
Therefore, [when I] was wanting [to do] this, perhaps then was I making use of vacillation? Or was I deciding what I was deciding according to the flesh, in order that with me my "yes" may be "yes" and my "no" [may be] "no" [at the same time]?
2 Corinthians 13:1-2
This [is] the third [time] I am coming to you. {By the testimony} of two or three witnesses every word will be established.
Philippians 3:1
Finally, my brothers, rejoice in the Lord. To write the same [things] to you [is] not troublesome to me, but [is] a safeguard for you.
Philippians 4:4
Rejoice in the Lord always; again I say, rejoice.
Revelation 22:18-19
I testify to everyone who hears the words of the prophecy of this book: if anyone adds to them, God will add to him the plagues written in this book.