Isaiah 58:4-5

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?”