Every seventh year, during which the land, according to the law of Moses, had to remain uncultivated (Lev. 25:2-7; comp. Ex. 23:10, 11, 12; Lev. 26:34, 35). Whatever grew of itself during that year was not for the owner of the land, but for the poor and the stranger and the beasts of the field. All debts, except those of foreigners, were to be remitted (Deut. 15:1-11). There is little notice of the observance of this year in Biblical history. It appears to have been much neglected (2 Chr. 36:20, 21).
Easton's Bible Dictionary. M.G. Easton. 1897.