לֹא־יִקְשֶׁ֣ה בְעֵינֶ֗ךָ בְּשַׁלֵּֽחֲךָ֙ אֹת֤וֹ חָפְשִׁי֙ מֵֽעִמָּ֔ךְ כִּ֗י מִשְׁנֶה֙ שְׂכַ֣ר שָׂכִ֔יר עֲבָֽדְךָ֖ שֵׁ֣שׁ שָׁנִ֑ים וּבֵֽרַכְךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ בְּכֹ֖ל אֲשֶׁ֥ר תַּעֲשֶֽׂה׃ (פ)
Тебе не покажется тяжело, когда ты отпустишь его на свободу; ибо вдвойне от найма наемника он прослужил тебе шесть лет; и Господь, Бог твой, благословит тебя во всем, что ты делаешь.
Sifra
6) — whence we derive that one who was sold to a gentile has the upper hand (in the reckoning). Whence is it derived that when he is sold to a Jew, when he is redeemed he has the upper hand? From "hired man" (here) - "hired man" (Devarim 15:18, with respect to one who is sold by beth-din) — a gezeirah shavah (identity) — Just as with "hired man" mentioned in respect to (his being sold to) a gentile, he (the servant) has the upper hand (in his redemption), so, with "hired man" mentioned in respect to (his being sold to) a Jew, he (the servant) has the upper hand in his redemption.