seventh

In Jeremiah 34:14, we read that a Hebrew slave which has served six years must be let go at the end of the seventh year:

Jer 34:14:
מִקֵּץ שֶׁבַע שָׁנִים תְּֽשַׁלְּחוּ אִישׁ אֶת־אָחִיו הָעִבְרִי אֲשֶֽׁר־יִמָּכֵר לְךָ וַעֲבָֽדְךָ שֵׁשׁ שָׁ…