New Revised Standard Version, Anglicised Catholic Edition
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?
6 Is not this the fast that I choose:
to loose the bonds of injustice,
to undo the thongs of the yoke,
to let the oppressed go free,
and to break every yoke?