Deuteronomy 15:12
If one of your countrymen, a Hebrew man or woman, becomes your servant for a price and does work for you six years, in the seventh year let him go free.
Jeremiah 34:14
At the end of seven years every man is to let go his countryman who is a Hebrew, who has become yours for a price and has been your servant for six years; you are to let him go free: but your fathers gave no attention and did not give ear.
Leviticus 25:39-41
And if your brother becomes poor and gives himself to you for money, do not make use of him like a servant who is your property;
Exodus 21:2-6
If you get a Hebrew servant for money, he is to be your servant for six years, and in the seventh year you are to let him go free without payment.
Deuteronomy 15:1
At the end of every seven years there is to be a general forgiveness of debt.
John 8:35-36
Now the servant does not go on living in the house for ever, but the son does.