Isaiah 28:28-29

The Voice

²⁸ Similarly, you have to grind grain to have flour for bread,
    but you don’t grind it endlessly.
When the wheel on the cart and the horses go over the grain,
    you must be careful not to crush it.
²⁹ The Eternal, Commander of heavenly armies,
    is the source of such wisdom.
    His advice is wonderful.