לֹא־תַעֲשֹׁ֥ק שָׂכִ֖יר עָנִ֣י וְאֶבְי֑וֹן מֵאַחֶ֕יךָ א֧וֹ מִגֵּרְךָ֛ אֲשֶׁ֥ר בְּאַרְצְךָ֖ בִּשְׁעָרֶֽיךָ׃
Thou shalt not oppress a hired servant that is poor and needy, whether he be of thy brethren, or of thy strangers that are in thy land within thy gates.
Read kabbalistic (mystical) interpretation of Deuteronomy 24:14: and classical mystical sources.