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.

Joshua 23:16

23:16 If you violate the covenantal laws of the Lord your God which he commanded you to keep, and follow, worship, and bow down to other gods, the Lord will be very angry with you and you will disappear quickly from the good land which he gave to you.”