This Book of the Law must not depart from your mouth; meditate on it day and night, so that you may be careful to do everything written in it. For then you will prosper and succeed in all you do.
Jewish Publication Society of America Version (JPS1917) - Joshua 1:8 >This book of the law shall not depart out of thy mouth, but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein; for then thou shalt make thy ways prosperous, and then thou shalt have good success.