Isaiah 58:4-5

Behold, you fast with strife and contention, and you strike with the fist impiously. Do not choose to fast as you have done even to this day. Then your outcry will be heard on high. Is this a fast such as I have chosen: for a man to afflict his soul for a day, to contort his head in a circle, and to spread sackcloth and ashes? Should you call this a fast and a day acceptable to the Lord?