It is, therefore, written (Ibid.) "because it has been declared shemitah to the L-rd" — (Money-shemitah obtains) both in Eretz Yisrael and outside the land.
(Devarim 15:2) "And this is the word of the shemitah": From here it was ruled: If a debtor returns his debt in the seventh year, the creditor must tell him: "I release it."