Galatians 1:9

As we have said before, now also again I say, If any one announce to you as glad tidings anything besides what ye have received, let him be accursed.

Deuteronomy 4:2

Ye shall not add to the word which I command you, neither shall ye take from it, that ye may keep the commandments of Jehovah your God which I command you.

Deuteronomy 12:32-11

Everything that I command you, ye shall take heed to do it; thou shalt not add thereto, nor take from it.

Proverbs 30:6

Add thou not unto his words, lest he reprove thee, and thou be found a liar.

Romans 16:17

But I beseech you, brethren, to consider those who create divisions and occasions of falling, contrary to the doctrine which ye have learnt, and turn away from them.

2 Corinthians 1:17

Having therefore this purpose, did I then use lightness? Or what I purpose, do I purpose according to flesh, that there should be with me yea yea, and nay nay?

2 Corinthians 13:1-2

This third time I am coming to you. In the mouth of two or three witnesses shall every matter be established.

Philippians 3:1

For the rest, my brethren, rejoice in the Lord: to write the same things to you, to me is not irksome, and for you safe.

Philippians 4:4

Rejoice in the Lord always: again I will say, Rejoice.

Revelation 22:18-19

I testify to every one who hears the words of the prophecy of this book, If any one shall add to these things, God shall add to him the plagues which are written in this book.

Treasury of Scripture Knowledge

Summary

As we said before, so say I now again, If any man preach any other gospel unto you than that ye have received, let him be accursed.

General references

Bible References

So

2 Corinthians 1:17
Having therefore this purpose, did I then use lightness? Or what I purpose, do I purpose according to flesh, that there should be with me yea yea, and nay nay?
2 Corinthians 13:1
This third time I am coming to you. In the mouth of two or three witnesses shall every matter be established.
Philippians 3:1
For the rest, my brethren, rejoice in the Lord: to write the same things to you, to me is not irksome, and for you safe.
Philippians 4:4
Rejoice in the Lord always: again I will say, Rejoice.

Than

Deuteronomy 4:2
Ye shall not add to the word which I command you, neither shall ye take from it, that ye may keep the commandments of Jehovah your God which I command you.
Deuteronomy 12:32
Everything that I command you, ye shall take heed to do it; thou shalt not add thereto, nor take from it.
Deuteronomy 13:1
If there arise among you a prophet, or one that dreameth dreams, and he give thee a sign or a wonder,
Proverbs 30:6
Add thou not unto his words, lest he reprove thee, and thou be found a liar.
Revelation 22:18
I testify to every one who hears the words of the prophecy of this book, If any one shall add to these things, God shall add to him the plagues which are written in this book.

General references

Leviticus 15:8
And if he that hath the flux spit upon him that is clean, then he shall wash his garments, and bathe in water, and be unclean until the even.
1 Corinthians 3:11
For other foundation can no man lay besides that which is laid, which is Jesus Christ.