New Living Translation
Be strong and very courageous. Be careful to obey all the instructions Moses gave you. Do not deviate from them, turning either to the right or to the left. Then you will be successful in everything you do.

American Standard Version
Only be strong and very courageous, to observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest have good success whithersoever thou goest.

Berean Study Bible
Above all, be strong and very courageous. Be careful to observe all the law that My servant Moses commanded you. Do not turn from it to the right or to the left, so that you may prosper wherever you go.

Douay-Rheims Bible
Take courage therefore, and be very valiant: that thou mayst observe and do all the law, which Moses my servant hath commanded thee: turn not from it to the right hand or to the left, that thou mayst understand all things which thou dost.

English Revised Version
Only be strong and very courageous, to observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest have good success whithersoever thou goest.

King James Bible
Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest prosper whithersoever thou goest.

World English Bible
Only be strong and very courageous, to observe to do according to all the law, which Moses my servant commanded you. Don't turn from it to the right hand or to the left, that you may have good success wherever you go.

Young's Literal Translation
Only, be strong and very courageous, to observe to do according to all the law which Moses My servant commanded thee; thou dost not turn aside from it right or left, so that thou dost act wisely in every place whither thou goest;

Joshua 1:7 Additional Translations ...