Joshua 1:7 ESV

1 Chronicles 22:13 ESV
Then you will prosper if you are careful to observe the statutes and the rules that the Lord commanded Moses for Israel. Be strong and courageous. Fear not; do not be dismayed.

Deuteronomy 5:32 ESV
You shall be careful therefore to do as the Lord your God has commanded you. You shall not turn aside to the right hand or to the left.

Joshua 1:8 ESV
This Book of the Law shall not depart from your mouth, but you shall meditate on it day and night, so that you may be careful to do according to all that is written in it. For then you will make your way prosperous, and then you will have good success.