Jeremiah 34
14 Ref At the end of seven years you shall let go every man his brother who is a Hebrew, who has been sold to you, and has served you six years, you shall let him go free from you: but your fathers didn't listen to me, neither inclined their ear.
15 Ref You were now turned, and had done that which is right in my eyes, in proclaiming liberty every man to his neighbor; and you had made a covenant before me in the house which is called by my name: