Geremia 34:9

That every man should let his manservant, and every man his maidservant, [being] an Hebrew or an Hebrewess, go free; that none should serve himself of them, [to wit], of a Jew his brother.

Ver. 9. That every man should let his manservant.] Should manumit and dismiss him at six years' end, according to the law. Exo 21:1-2 The seventh year a was called the year of liberty, and then they were to let go their brethren that served them, and this in a thankful remembrance of their deliverance from the Egyptian servitude. But this they had neglected to do; and now, to pacify God's wrath, and to prevent, if it might be, the Chaldeans' cruelty, this coarse they took, and not altogether without success, for the siege was thereupon raised for a season; and had they returned to God with all their heart and with all their soul, who knows what might have been further done for them? But they did nothing less; therefore came wrath upon them to the utmost.

a Hic septimus annus fuit typus aeternae liberationis post curriculum sex dierum mundi, sex mille annorum.