Isaiah 58:3-5

New Revised Standard Version Catholic Edition

³ “Why do we fast, but you do not see?
    Why humble ourselves, but you do not notice?”
Look, you serve your own interest on your fast day,
    and oppress all your workers.
⁴ Look, you fast only to quarrel and to fight
    and to strike with a wicked fist.
Such fasting as you do today
    will not make your voice heard on high.
⁵ Is such the fast that I choose,
    a day to humble oneself?
Is it to bow down the head like a bulrush,
    and to lie in sackcloth and ashes?
Will you call this a fast,
    a day acceptable to the Lord?