כִּֽי־עֲבָדַ֣י הֵ֔ם אֲשֶׁר־הוֹצֵ֥אתִי אֹתָ֖ם מֵאֶ֣רֶץ מִצְרָ֑יִם לֹ֥א יִמָּכְר֖וּ מִמְכֶּ֥רֶת עָֽבֶד׃
For they are My servants, whom I brought forth out of the land of Egypt; they shall not be sold as bondmen.
Read kabbalistic (mystical) interpretation of Leviticus 25:42: and classical mystical sources.