Deuteronomy 15:18
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.
Cross-reference
Deuteronomy 15:10
Related theme
Deuteronomy 15:10 promises blessing for generous giving, just as this verse promises blessing for not grudgingly freeing a slave.
Exodus 21:2
Parallel
Exodus 21:2 states the foundational six-year service rule that this verse applies, reminding that the slave goes free in the seventh year.
Leviticus 25:50
Parallel
Leviticus 25:50 also uses the hired-worker analogy to calculate a slave's redemption price, reflecting the same valuation principle.