Galatians 1:9
I have said it before and I now repeat it: whoever preaches a gospel to you that contradicts the gospel you have already received, God's curse be on him!
Romans 16:17
Brothers, I beg of you to keep your eye on those who stir up dissensions and put hindrances in your way, contrary to the doctrine which you have been taught. Avoid them.
2 Corinthians 1:17
Such was my intention. Now, have I shown myself 'fickle'? When I propose some plan, do I propose it in a worldly way, ready to mean 'no' as well as 'yes'?
2 Corinthians 13:1-2
This will be my third visit to you: every case is to be decided on the evidence of two or of three witnesses.
Philippians 3:1
Well then, my brothers, rejoice in the Lord. I am repeating this word 'rejoice' in my letter, but that does not tire me and it is the safe course for you. ??2 Beware of these dogs, these wicked workmen, the incision-party!
Philippians 4:4
Rejoice in the Lord always. I will say it again, 'rejoice.'
Revelation 22:18-19
[I adjure all who hear the words of the prophecy of this book: "If anyone adds to them, God will add to him the plagues described in this book;