Leviticus 25:50
"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."
Cross References (ranked by relevance)
For thus hath the LORD said unto me, Within a year, according to the years of an hireling, and all the glory of Kedar shall fail:
But now the LORD hath spoken, saying, Within three years, as the years of an hireling, and the glory of Moab shall be contemned, with all that great multitude; and the remnant shall be very small and feeble.
And as a yearly hired servant shall he be with him: and the other shall not rule with rigour over him in thy sight.
Turn from him, that he may rest, till he shall accomplish, as an hireling, his day.
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.
But as an hired servant, and as a sojourner, he shall be with thee, and shall serve thee unto the year of jubile: