Berean Study Bible
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.

King James Bible
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 way prosperous, and then thou shalt have good success.

American Standard Version
This book of the law shall not depart out of thy mouth, but thou shalt meditate thereon day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.

Darby Bible Translation
This book of the law shall not depart from thy mouth; and thou shalt meditate upon it day and night, that thou mayest take heed to do according to all that is written therein; for then shalt thou have good success in thy ways, and then shalt thou prosper.

Douay-Rheims Bible
Let not the book of this law depart from thy mouth: but thou shalt meditate on it day and night, that thou mayst observe and do all things that are written in it: then shalt thou direct thy way, and understand it.

English Revised Version
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 way prosperous, and then thou shalt have good success.

Young's Literal Translation
the book of this law doth not depart out of thy mouth, and thou hast meditated in it by day and by night, so that thou dost observe to do according to all that is written in it, for then thou dost cause thy way to prosper, and then thou dost act wisely.