Unto a stranger you may lend for interest; but unto your brother you shall not lend for interest: that the LORD your God may bless you in all that you set your hand to in the land where you go to possess it.
And this is the manner of the release: Every creditor that lends anything unto his neighbor shall release it; he shall not exact it of his neighbor, or of his brother; because it is called the LORD'S release.
When you shall vow a vow unto the LORD your God, you shall not delay to pay it: for the LORD your God will surely require it of you; and it would be sin to you.