Deuteronomy 12:32
Whatsoever thing I command you, observe to do it: you shall not add thereto, nor take away from it.
Deuteronomy 4:2
You shall not add unto the word which I command you, neither shall you take away from it, that you may keep the commandments of the LORD your God which I command you.
Joshua 1:7
Only be strong and very courageous, that you may observe to do according to all the law, which Moses my servant commanded you: turn not from it to the right hand or to the left, that you may prosper wherever you go.
Proverbs 30:6
Add not unto his words, lest he reprove you, and you be found a liar.
Revelation 22:18-19
For I testify unto every man that hears the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book:
Deuteronomy 13:18
When you shall hearken to the voice of the LORD your God, to keep all his commandments which I command you this day, to do that which is right in the eyes of the LORD your God.
Matthew 28:20
Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.