Wisdom of Ben Sira 33:26-28

New Catholic Bible

²⁶ If you work your slave hard, you will have rest for yourself;
    if you allow his hands to be idle, he will seek his freedom.
²⁷ Yoke and harness will bow the neck of an ox;
    for a wicked slave, apply the rack and torture.
²⁸ Put him to work so that he will not be idle,