Isaiah 58:6, 13-14

Is not this the fast that I have chosen: to loose the bonds of wickedness, to undo the bands of the yoke, and to let the oppressed go free, and that ye break every yoke?

If thou turn away thy foot from the sabbath, from doing thy pleasure on my holy day; and call the sabbath a delight, and the holy of Jehovah honorable; and shalt honor it, not doing thine own ways, nor finding thine own pleasure, nor speaking thine own words: then shalt thou delight thyself in Jehovah; and I will make thee to ride upon the high places of the earth; and I will feed thee with the heritage of Jacob thy father: for the mouth of Jehovah hath spoken it.