Deuteronomy 23:19
You shall not lend on interest to your brother: interest of money, interest of food, interest of anything that is lent on interest.
World English Bible (Public Domain)
In context
Before · Deuteronomy 23:17–18
17There shall be no prostitute of the daughters of Israel, neither shall there be a sodomite of the sons of Israel. 18You shall not bring the hire of a prostitute, or the wages of a male prostitute, into the house of the LORD your God for any vow; for both of these are an abomination to the LORD your God.
19You shall not lend on interest to your brother: interest of money, interest of food, interest of anything that is lent on interest.
After · Deuteronomy 23:20–21
20You may charge a foreigner interest; but you shall not charge your brother interest, that the LORD your God may bless you in all that you put your hand to, in the land where you go in to possess it. 21When you vow a vow to the LORD your God, you shall not be slack to pay it, for the LORD your God will surely require it of you; and it would be sin in you.