Digest of Biblical Civil Law

Since all debts were cancelled at the beginning of the seventh year, that was also when debt-slaves were released. So, the seventh year in Exo. 21:2 is not necessarily the seventh from the beginning of enslavement, but is the sabbath year.

- James Jordan, The Law of the Covenant 76 (1984), at http://www.garynorth.com/freebooks/:  HTML, DjVu.