Isaiah 58:3-4

3‘We have fasted before you!’ they say. ‘Why aren’t you impressed? We have been very hard on ourselves, and you don’t even notice it!’ “I will tell you why!” I respond. “It’s because you are fasting to please yourselves. Even while you fast, you keep oppressing your workers.

4What good is fasting when you keep on fighting and quarreling? This kind of fasting will never get you anywhere with me.