Deuteronomy 28:13-15

The LORD will make you the head, not the tail. If you pay attention to the commands of the LORD your God that I give you this day and carefully follow them, you will always be at the top, never at the bottom. Do not turn aside from any of the commands I give you today, to the right or to the left, following other gods and serving them. However, if you do not obey the LORD your God and do not carefully follow all his commands and decrees I am giving you today, all these curses will come on you and overtake you