Deuteronomy 5:32

5:32 Be careful, therefore, to do exactly what the Lord your God has commanded you; do not turn right or left!

Deuteronomy 12:32

Idolatry and False Prophets

12:32 (13:1) You must be careful to do everything I am commanding you. Do not add to it or subtract from it!

Deuteronomy 28:14

28:14 But you must not turn away from all the commandments I am giving you today, to either the right or left, nor pursue other gods and worship them.

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.