Washing Sins White as Snow

Isaiah 1:18-20English Standard Version (ESV)

18 “Come now, let us reason[a] 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.
19 If you are willing and obedient,
    you shall eat the good of the land;
20 but if you refuse and rebel,
    you shall be eaten by the sword;
    for the mouth of the Lord has spoken.”