You cannot fast as you do today and expect your voice to be heard on high. Is not this the kind of fasting I have chosen: to loose the chains of injustice and untie the cords of the yoke, to set the oppressed free and break every yoke? Is it not to share your food with the hungry and to provide the poor wanderer with shelter - when you see the naked, to clothe him …

Isaiah 58:4,6-7