After identifying the vision of Isaiah son of Amoz about Judah and Jerusalem, the Lord calls heaven and earth as witnesses. His children have rebelled against him: the ox and the donkey know their owner, but Israel does not. The land is devastated, Zion is left like a shelter in a vineyard, and only a small remnant keeps Judah from ending up like Sodom and Gomorrah.
Then the Lord rejects religion without justice. The sacrifices, offerings, incense and festivals have become a burden to him because the people's hands are full of blood. He tells them to wash, stop doing evil, learn to do good, seek justice, help the oppressed and defend the orphan and the widow. He then makes an invitation: though their sins are like scarlet, they can become white as snow. Obedience brings blessing; refusal and rebellion bring the sword.
The second half laments that the faithful city has become a harlot. Her silver is dross, her rulers love bribes and do not defend the orphan or the widow. The Lord promises to purge the dross, to restore judges and counselors as at the beginning and to redeem Zion with justice. Rebels and those attached to idols, however, will be ashamed and consumed like a fire no one puts out.