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.