Deuteronomy 26:16

16 Today Israel, thy Lord God commanded to thee, that thou do these behests and dooms, that thou keep and fulfill them of all thine heart, and of all thy soul. (Today Israel, the Lord thy God hath commanded thee, that thou obey these statutes and laws, or judgements, that thou keep and fulfill them with all thy heart, and with all thy soul.)

Deuteronomy 26:16 Meaning and Commentary

Deuteronomy 26:16

This day the Lord thy God hath commanded thee to do these
statutes and judgments
These are the words of Moses, as Aben Ezra rightly observes, and refer not only to the laws last mentioned, but to all others which he had repeated, or the Lord by him had ordered to be observed, recorded in this book: and though it is very probable Moses had been several days repeating former laws, and acquainting them with new ones; yet this being the last day, in which the whole account was finished, they are said to be commanded that day, and though commanded that day were to be observed and done every day; for, as Jarchi says, every day was to be considered and reckoned as new, as if on that day they were commanded them:

thou shall therefore keep and do them with all thy heart, and with all
thy soul;
cordially, readily, willingly, sincerely, constantly, and to the utmost of their abilities.

Deuteronomy 26:16 In-Context

14 I ate not of those things in my mourning, neither I separated them in(to) any uncleanness, neither I spended of those anything in burying of a dead body (I did not eat any of it while mourning, I did not put any of it aside for unclean uses, and I did not spend any of it for burying a dead body). I obeyed to the voice of my Lord God, and I did all things as thou commandedest to me.

15 Behold thou from thy saintuary, from the high dwelling place of heaven, and bless thou thy people Israel, and the land which thou hast given to us, as thou hast sworn to our fathers, the land flowing with milk and honey.

16 Today Israel, thy Lord God commanded to thee, that thou do these behests and dooms, that thou keep and fulfill them of all thine heart, and of all thy soul. (Today Israel, the Lord thy God hath commanded thee, that thou obey these statutes and laws, or judgements, that thou keep and fulfill them with all thy heart, and with all thy soul.)

17 Thou hast chosen the Lord today, that he be God to thee, and that thou go in his ways, and that thou keep his ceremonies, and his behests, and his dooms, and obey to his commandment. (Thou hast chosen the Lord today, that he be thy God, and that thou go in his ways, and that thou keep his statutes, and his commandments, and his laws, or his judgements, and obey his bidding, or his orders.)

18 Lo! the Lord hath chosen thee today, that thou be a special people to him, as he hath spoken to thee, and that thou keep all his commandments; (Lo! the Lord hath chosen thee today, that thou be a special people to him, as he hath promised thee, and also that thou obey all his commandments;)