Is this not the fast that I choose:
To release the bonds of wickedness,
To undo the ropes of the yoke,
And to let the oppressed go free,
And break every yoke?
Is it not to break your bread with the hungry
And bring the homeless poor into the house;
When you see the naked, to cover him;
And not to hide yourself from your own flesh?
 Then your light will break out like the dawn,
And your recovery will spring up quickly;
And your righteousness will go before you;
The glory of the Lord will be your rear guard.
Then you will call, and the Lord will answer;
You will cry for help, and He will say, ‘Here I am.’
If you remove the yoke from your midst,
The pointing of the finger and speaking wickedness,
 And if you offer yourself to the hungry
And satisfy the need of the afflicted,
Then your light will rise in darkness,
And your gloom will become like midday.
 And the Lord will continually guide you,
And satisfy your desire in scorched places,
And give strength to your bones;
And you will be like a watered garden,
And like a spring of water whose waters do not fail.
 Those from among you will rebuild the ancient ruins;
You will raise up the age-old foundations;
And you will be called the repairer of the breach,
The restorer of the streets in which to dwell.

Isaiah 58:6-12