Revelation 22:18
I testify to everyone who hears the words of prophecy in this book: If anyone adds to them, God will add to him the plagues described in this book.

Revelation 22:19
And if anyone takes away from the words of this book of prophecy, God will take away his share in the tree of life and in the holy city, which are described in this book.

Deuteronomy 4:2
You must not add to or subtract from what I command you, so that you may keep the commandments of the LORD your God I am giving you.

Joshua 1:7
Above all, be strong and very courageous. Be careful to observe all the law My servant Moses commanded you. Do not turn from it to the right or to the left, so that you may prosper wherever you go.

Proverbs 30:6
Do not add to His words, lest He rebuke you and prove you a liar.

Ezekiel 44:5
The LORD said to me: "Son of man, pay attention; look carefully with your eyes and listen closely with your ears to everything I tell you concerning all the statutes and laws of the house of the LORD. Take careful note of the entrance of the temple, along with all the exits of the sanctuary.