Word of God: Not to be Added To, or Taken From
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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 that I am giving you.
Deuteronomy 12:32
See that you do everything I command you; do not add to it or subtract from it.
Revelation 22:18, 19
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. / 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 the holy city, which are described in this book.