‏ Deuteronomy 15:18

18You should not consider it difficult to let him go free, for he will have served you for six years, twice
tn The Hebrew term מִשְׁנֶה (mishneh, “twice”) could mean “equivalent to” (cf. NRSV) or, more likely, “double” (cf. NAB, NIV, NLT). The idea is that a hired worker would put in only so many hours per day whereas a bondslave was available around the clock.
the time of a hired worker; the Lord your God will bless you in everything you do.
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