Deuteronomy 4:40

40 Keep thou his behests, and his commandments, which I command to thee, that it be well to thee, and to thy sons after thee, and that thou dwell much time upon the land, which thy Lord God shall give to thee. (Obey thou his statutes, and his commandments, which I command to thee, that it be well with thee, and with thy children after thee, and so that thou live a long time on the land, which the Lord thy God shall give to thee.)

Deuteronomy 4:40 Meaning and Commentary

Deuteronomy 4:40

Thou shall keep therefore his statutes, and his commandments,
&c.] All his laws, moral, ceremonial, and judicial, partly being under obligation to him for all the great and good things done by him for them before enumerated, and partly and chiefly because he is the Lord God in heaven and in earth, and has a right to command and ought to be obeyed:

which I command thee this day;
in the name of the Lord, and which he repeated, opened, and explained, and charged them afresh to observe; otherwise they were such that had been given long ago:

that it may go well with thee, and with thy children after thee;
that they and theirs might enjoy temporal mercies, and continue in the land of Canaan, and partake of all the blessings in it, as follows, and of the sanctuary of the Lord, and the privileges of it:

and that thou mayest prolong thy days upon the earth, which the Lord
thy God giveth thee for ever;
that is, that they and theirs might live long in the land of Canaan, which the Lord gave for an inheritance for ever, provided they kept his law, and were obedient to his commands; see ( Deuteronomy 6:25 ) ( Isaiah 1:19 ) , and though they have had several interruptions by their captivities, and especially by their present very long one, yet when they shall return and seek the Lord their God, and David their king, they shall have their land restored to them again, and shall never more be dispossessed of it.

Deuteronomy 4:40 In-Context

38 that he should do away the greatest nations, and stronger than thou, in thine entering, and that he should lead thee in, and should give to thee their land into possession (and should give thee their land for a possession), as thou seest in (this) present day.

39 Therefore know thou today, and think in thine heart, that the Lord himself is God in heaven above, and in earth beneath, and none other is. (And so know thou today, and take to thy heart, that the Lord himself is God in heaven above, and on the earth beneath, and there is no other.)

40 Keep thou his behests, and his commandments, which I command to thee, that it be well to thee, and to thy sons after thee, and that thou dwell much time upon the land, which thy Lord God shall give to thee. (Obey thou his statutes, and his commandments, which I command to thee, that it be well with thee, and with thy children after thee, and so that thou live a long time on the land, which the Lord thy God shall give to thee.)

41 Then Moses separated three cities beyond (the) Jordan at the east coast, (Then Moses set apart three cities east of the Jordan River,)

42 that he flee to those, that slayeth his neighbour not willfully, and was not (an) enemy (to him) before one and the tother day, and that he may flee to some of these cities; (so that anyone might flee to them, who did not willfully, or intentionally, kill his neighbour, and was not an enemy to him the day before, and so that he might escape to one of these cities, and live;)