Leviticus 26:34

The land shall enjoy her sabbaths It shall enjoy those sabbatical years of rest from tillage, which you, through covetousness, would not give it: a most seasonable warning this. Jeremiah complains, that in his time they had contemned the ordinance of God respecting the septennial sabbaths, and had not given their servants liberty, (Jeremiah 34:17,) and gives this as one cause of their being delivered to slavery, Lamentations 1:3. And this is expressly mentioned as a principal reason of their seventy years captivity, 2 Chronicles 36:21.