לֹא־יַחֲבֹ֥ל רֵחַ֖יִם וָרָ֑כֶב כִּי־נֶ֖פֶשׁ ה֥וּא חֹבֵֽל׃ (ס)
No man shall take the mill or the upper millstone to pledge; for he taketh a man’s life to pledge.
Read kabbalistic (mystical) interpretation of Deuteronomy 24:6: and classical mystical sources.