Isaiah 58:2-8

2Yet they seek me daily, and delight to know my ways, as a nation that did righteousness, and forsook not the ordinance of their God: they ask of me the ordinances of justice; they take delight in approaching to God.

3Why have we fasted, say they, and thou seest not? why have we afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find pleasure, and exact all your labours.1 4Behold, ye fast for strife and debate, and to smite with the fist of wickedness: ye shall not fast as ye do this day, to make your voice to be heard on high.2 5Is it such a fast that I have chosen? a day for a man to afflict his soul? is it to bow down his head as a bulrush, and to spread sackcloth and ashes under him ? wilt thou call this a fast, and an acceptable day to the LORD?3 6Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke?45 7Is it not to deal thy bread to the hungry, and that thou shouldest bring the poor that are cast out to thy house? when thou seest the naked, that thou shouldest cover him; and that thou shouldest not hide thyself from thy own flesh?6

8Then shall thy light break forth as the morning, and thy health shall spring forth speedily: and thy righteousness shall go before thee; the glory of the LORD shall be thy rear guard.7