Deuteronomy 15:12

12 aIf your brother, a Hebrew man or a Hebrew woman, is sold
Or sells himself
to you, he shall serve you six years, and in the seventh year you shall let him go free from you.

Jeremiah 34:9

9 cthat everyone should set free his Hebrew slaves, male and female, dso that no one should enslave a Jew, his brother.
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