Joshua 1:7

1 Chronicles 22:13 NIV
Then you will have success if you are careful to observe the decrees and laws that the Lord gave Moses for Israel. Be strong and courageous. Do not be afraid or discouraged.

Deuteronomy 5:32 NIV
So be careful to do what the Lord your God has commanded you; do not turn aside to the right or to the left.

Joshua 1:8 NIV
Keep this Book of the Law always on your lips; meditate on it day and night, so that you may be careful to do everything written in it. Then you will be prosperous and successful.