Deuteronomy 15:18

It shall not seem hard to you when you let him go free from you, for at half the cost of a hired worker he has served you six years . So the Lord your God will bless you in all that you do .

Do not consider it a hardship to set your servant free, because their service to you these six years has been worth twice as much as that of a hired hand. And the Lord your God will bless you in everything you do.

It shall not seem hard unto thee, when thou sendest him away free from thee; for he hath been worth a double hired servant to thee , in serving thee six years : and the Lord thy God shall bless thee in all that thou doest.