Isaiah 59:6
Their webs shall not become garments, neither shall they cover themselves with their works: their works are works of iniquity, and the act of violence is in their hands. Their webs shall not become garments, neither shall they cover themselves with their works: their works are works of iniquity, and the act of violence is in their hands.
Isaiah 59:6 belongs to a portrayal of the nation's unrighteous condition that accounts for the calamity that had come upon it. That condition is why God had turned away from the people. The webs that cannot become garments and the works of iniquity and violence are the people forsaking and forgetting God, choosing other gods and following their own corrupt ways. They are trampling upon the law of God and breaking His everlasting covenant.
Works marked by iniquity and violence cannot cover sin or serve as a true covering. Evil deeds cannot make a person righteous, for the works are themselves iniquity and violence is in their hands. Those who trust in such works remain exposed to the consequences of sin.
The verse describes the character of the priests and rabbis who opposed Jesus. Their teachings and works are works of iniquity that cannot cover them. They misled the people with false reasoning and perverted the prophecies of the Messiah to sanction their error. Their hands carried out violence as they sought His death.
The chapter prophesies the state of the world just prior to the second coming, when at the end of all things iniquity abounds. That abounding iniquity comes by continual transgression, because men have transgressed the law and broken the everlasting covenant given on condition of obedience. Men turn away from God and His righteous government, and the world becomes more and more under the sway of seducing spirits. Even men professing godliness indulge their own traits of character, becoming self-indulgent and self-centered unless conscientiously under the control of God.
As part of Isaiah 59 through 62, the verse belongs to passages that define the work of Christ. That work is to save the people over whom Satan exercises power. It is to work out the purposes planned in the counsels of heaven. It is to set things in their right light after God's vineyard had been worked by unrighteous scribes and Pharisees.