Isaiah 58: 1-12 (entire reading, here is just a snippet):
They ask me for laws that are just,
they long for God to draw near:
‘Why should we fast if you never see it,
why do penance if you never notice?’
Look, you do business on your fast-days,
you oppress all your workmen;
look, you quarrel and squabble when you fast
and strike the poor man with your fist.
Fasting like yours today
will never make your voice heard on high.
Is that the sort of fast that pleases me,
a truly penitential day for men?
Hanging your head like a reed,
lying down on sackcloth and ashes?
Is that what you call fasting,
a day acceptable to the Lord?
Is not this the sort of fast that pleases me
– it is the Lord who speaks –
to break unjust fetters and
undo the thongs of the yoke,
to let the oppressed go free,
and break every yoke,
to share your bread with the hungry,
and shelter the homeless poor,
to clothe the man you see to be naked
and not turn from your own kin?
Then will your light shine like the dawn
and your wound be quickly healed over.
Your integrity will go before you
and the glory of the Lord behind you.
Cry, and the Lord will answer;
call, and he will say, ‘I am here.’
If you do away with the yoke,
the clenched fist, the wicked word,
if you give your bread to the hungry,
and relief to the oppressed,
your light will rise in the darkness,
and your shadows become like noon.
The Lord will always guide you,
giving you relief in desert places.