The Book of Deuteronomy is the fifth book of the Bible and the last of the Pentateuch or Torah, the five books written by Moses. Deuteronomy contains three sermons given by Moses to the Israelites who are to enter the promised land. The word Deuteronomy means 'second law giving' as the book reiterates the laws God has given to His people for the generation of Israelites who were not present when the laws were first given.
Deuteronomy 28:13-14
"And the Lord shall make thee the head, and not the tail; and thou shalt be above only, and thou shalt not be beneath; if that thou hearken unto the commandments of the Lord thy God, which I command thee this day, to observe and to do them: and thou shalt not go aside from any of the words which I command thee this day, to the right hand, or to the left, to go after other gods to serve them"