Deuteronomy 23:20
23:20 You may lend with interest to a foreigner, but not to your fellow Israelite; if you keep this command the Lord your God will bless you in all you undertake in the land you are about to enter to possess.
Deuteronomy 28:20
Curses by Disease and Drought
28:20 “The Lord will send on you a curse, confusing you and opposing you in everything you undertake until you are destroyed and quickly perish because of the evil of your deeds, in that you have forsaken me.