Isaiah 58:3-7

3— Wherefore have we fasted, and thou seest not; have afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find what pleaseth [you], and exact all your labours.

4Behold, ye have fasted for strife and debate, and to smite with the fist of wickedness; ye do not at present fast, to cause your voice to be heard on high.

5Is such the fast that I have chosen, a day for a man to afflict his soul, — that he should bow down his head as a bulrush, and spread sackcloth and ashes [under him]? Wilt thou call this a fast, and a day acceptable to Jehovah?

6Is not this the fast which I have chosen: to loose the bands of wickedness, to undo the thongs of the yoke, and to send forth free the crushed, and that ye break every yoke?

7Is it not to deal thy bread to the hungry, and that thou bring to thy house the needy wanderers; when thou seest the naked, that thou cover him; and that thou hide not thyself from thine own flesh?