'Book of the Law' in the Bible

Moreover, the LORD will inflict you with illnesses and plagues that were not written in this Book of the Law, until you are exterminated.

The LORD will set him apart from all the tribes of Israel for destruction, according to the curses of the covenant that were written in this Book of the Law."

if you obey him and keep his commands and statutes that are written in this Book of the Law, and if you return to him with all your heart and soul.