Deuteronomy 12:32
Whatever thing I command you, that shall ye observe to do. Thou shall not add to it, nor diminish from it.
Deuteronomy 4:2
Ye shall not add to the word which I command you, neither shall ye diminish from it, that ye may keep the commandments of LORD your God which I command you.
Joshua 1:7
Only be strong and very courageous to observe to do according to all the law, which Moses my servant commanded thee. Turn not from it to the right hand or to the left, that thou may have good success wherever thou go.
Proverbs 30:6
Add thou not to his words, lest he reprove thee, and thou be found a liar.
Revelation 22:18-19
I testify to every man who hears the words of the prophecy of this book, if any man should add to them, God will add to him the seven plagues that are written in this book.
Deuteronomy 13:18
when thou shall hearken to the voice of LORD thy God, to keep all his commandments which I command thee this day, to do that which is right in the eyes of LORD thy God.
Matthew 28:20
teaching them to observe all things, as many as I commanded you. And lo, I am with you all the days, until the end of the age. Truly.