Isaiah 64:6
All of us have become like and unclean thing, and all our righteousness is as filthy rags; we all shrivel up like a leaf, and like the wind our sins sweep us away.
Isaiah 1:18
"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 as crimson, they shall be like wool.