Дварим (Второзаконие) 24:6

לא יחבל NO MAN SHALL TAKE [THE LOWER OR THE UPPER MILLSTONE] AS PLEDGE — i.e. if one comes to demand a pledge through the court for his debt he should not take as a pledge anything by which food is prepared (Bava Metzia 113b, 115a). רחים is the lower, ורכב is the upper millstone.

No man shall take the nether or the upper millstone for a pledge: for he takes a man’s life for a pledge.

לֹא־יַחֲבֹ֥ל רֵחַ֖יִם וָרָ֑כֶב כִּי־נֶ֖פֶשׁ ה֥וּא חֹבֵֽל׃ {ס}