Isaiah 58:3-5

They say, ‘Why is it that when we fasted, you did not see it? We starved ourselves, and you didn’t seem to notice.’ “Because on the day you fasted you were seeking only your own desires, and you continue to exploit your workers. During your fasts, you quarrel and fight with others and strike them with an angry fist. When you fast like that, your voice will not be heard on high. Do you think I’m impressed with that kind of fast? Is it just a day to starve your bodies, make others think you’re humble, and lie down in sackcloth and ashes? Do you call that a fast? Do you think I, YAHWEH, will be pleased with that?”