'Book of the Law' in the Bible

And Jehovah shall set him apart to evil out of all the tribes of Israel, according to all the curses of the covenant that are written in this book of the Law;

for you shall listen to the voice of Jehovah your God, to keep His commandments and His statutes which are written in this book of the Law, and if you turn to Jehovah your God with all your heart and with all your soul.

Take this book of the Law, and put it in the side of the ark of the covenant of Jehovah your God, so that it may be there for a witness against you.