Joshua 1:6-8

6 Be strong and of a good courage: for to this people shall you divide for an inheritance the land, which I swore to their fathers to give them.

7 Only be you strong and very courageous, that you may observe to do according to all the law, which Moses my servant commanded you: turn not from it to the right hand or to the left, that you may prosper wherever you go.

8 This book of the law shall not depart out of your mouth; but you shall meditate therein day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.