Deuteronomy 1:18

For I have not shunned to declare unto you all the counsel of God.

Behold, I have taught you statutes and judgments, even as the LORD my God commanded me, that ye should do so in the land whither ye go to possess it.

Thou shalt keep therefore his statutes, and his commandments, which I command thee this day, that it may go well with thee, and with thy children after thee, and that thou mayest prolong thy days upon the earth, which the LORD thy God giveth thee, for ever.

And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publickly, and from house to house,

Observe and hear all these words which I command thee, that it may go well with thee, and with thy children after thee for ever, when thou doest that which is good and right in the sight of the LORD thy God.

Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.

What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.