Deuteronomy 28:13-15

13And Jehovah will make thee the head, and not the tail; and thou shalt be above only, and thou shalt not be beneath; if thou shalt hearken unto the commandments of Jehovah thy God, which I command thee this day, to observe and to do them, 14and shalt not turn aside from any of the words which I command you this day, to the right hand, or to the left, to go after other gods to serve them.

15But it shall come to pass, if thou wilt not hearken unto the voice of Jehovah thy God, to observe to do all his commandments and his statutes which I command thee this day, that all these curses shall come upon thee, and overtake thee.