Yeshayah (Isaiah) 58:4-5

“Look, you fast for strife and contention, and to strike with the fist of wrongness. You do not fast as you do this day, to make your voice heard on high. “Is it a fast that I have chosen, a day for a man to afflict his being? Is it to bow down his head like a bulrush, and to spread out sackcloth and ashes? Do you call this a fast, and an acceptable day to יהוה?