Leviticus 25:50

He and his buyer are to count the time from the year he sold himself up to the Year of Jubilee. The price for his release is to be based on the rate paid to a hired man for that number of years.

(New International Version)

'He then with his purchaser shall calculate from the year when he sold himself to him up to the year of jubilee; and the price of his sale shall correspond to the number of years. It is like the days of a hired man that he shall be with him.

(New American Standard Bible)

And he shall reckon with him that bought him from the year that he was sold to him unto the year of jubile: and the price of his sale shall be according unto the number of years, according to the time of an hired servant shall it be with him.

(King James Version)