Scripture on Bible.com: Isaiah 4:16-18
16 Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil, 17 learn to do good; seek justice, correct oppression; bring justice to the fatherless, plead the widow’s cause. 18 “Come now, let us reason together, says the Lord: though your sins are like scarlet, they shall be as white as snow; though they are red like crimson, they shall become like wool.