Galatians 1:9
We have said it before, and I repeat it now--If any one tells you a 'Good News' other than that which you received, may he be accursed!
Romans 16:17
I urge you, Brothers, to be on your guard against people who, by disregarding the teaching which you received, cause divisions and create difficulties; dissociate yourselves from them.
2 Corinthians 1:17
As this was my plan, where, pray, did I show any fickleness of purpose? Or do you think that my plans are formed on mere impulse, so that in the same breath I say 'Yes' and 'No'?
2 Corinthians 13:1-2
For the third time I am coming to see you. 'By the word of two or three witnesses each statement shall be established.'
Philippians 3:1
In conclusion, my Brothers, all joy be yours in your union with the Lord. To repeat what I have already written does not weary me, and is the safe course for you.
Philippians 4:4
All joy be yours at all times in your union with the Lord. Again I repeat--All joy be yours.
Revelation 22:18-19
I declare to all who hear the words of the prophecy contained in this book-- 'If anyone adds to it, God will add to his troubles the Curses described in this book;