"When the sun goes down you shall surely return the pledge to him, that he may sleep in his cloak and bless you; and it will be righteousness for you before the LORD your God." (Deuteronomy 24:13)
"You may charge interest to a foreigner, but to your countrymen you shall not charge interest, so that the LORD your God may bless you in all that you undertake in the land which you are about to enter to possess." (Deuteronomy 23:20)