Matthew Poole and continuators on Deuteronomy 23:19

19 Thou shalt not lend upon usury to thy brother, usury of money, usury of victuals, usury of any thing that is lent upon usury.

(i. e.) So as to receive thy principal mony or thing lent with such increase or improvement of it, as was usual and allowed among the Gentiles. But whether all usury be unlawful to Christians is too great a question to be determined in a work of this nature. See Exod. 22. 25. Deut. 15. 3. Psal. 15. 5. Nehem. 5. 2. Luke 6. 34.

Marginal references: Exod. 22. 25. Lev. 25. 36. Psal. 15. 5.