He that hath pity upon the poor lendeth unto the LORD; and that which he hath given will he pay him again.
He that hath pity upon the poor lendeth unto the Lord - making the Lord his debtor; for God regards favours to His people as done to Himself (Matthew 25:40).
And that which he hath given (literally, His benefit) will he pay him again. No surer Paymaster is there than Yahweh; none pays with such accumulated interest.