Joshua 1:7

Only be thou strong and very courageous, said with greater emphasis than in v. 6, that thou mayest observe to do according to all the Law which Moses, My servant, commanded thee, for the leader of the people must be an example to all his followers. Turn not from it, namely, from the roll of the written Law as it was preserved in the Ark of the Covenant, to the right hand or to the left, as the slightest deviation was a transgression, that thou mayest prosper, make use of the proper wisdom and thus be successful, whithersoever thou goest.