2.12 Debt, TVM, and Talmud
Lender: We offer by testimony that this person owes me one thousand zuzim to be re-paid in thirty days.
Borrower: No, it is owed within ten years.
Rabbis: We figure how much a person would offer to have one thousand zuzim in his possession now versus having to re-pay it in ten years.
– Mishnah, Makkoth 3a