Deuteronomy 4:2

4:2 Do not add a thing to what I command you nor subtract from it, so that you may keep the commandments of the Lord your God that I am delivering to you.

Deuteronomy 13:18

13:18 Thus you must obey the Lord your God, keeping all his commandments that I am giving you today and doing what is right before him.

Joshua 1:7

1:7 Make sure you are very strong and brave! Carefully obey all the law my servant Moses charged you to keep! Do not swerve from it to the right or to the left, so that you may be successful in all you do.

Proverbs 30:6

30:6 Do not add to his words,

lest he reprove you, and prove you to be a liar.

Matthew 28:20

28:20 teaching them to obey everything I have commanded you. And remember, I am with you always, to the end of the age.”

Revelation 22:18-19

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