Isaiah 1:16-18 Revised Standard Version Catholic Edition (RSVCE)
16 Wash yourselves; make yourselves clean;
remove the evil of your doings
from before my eyes;
cease to do evil,
17 learn to do good;
defend the fatherless,
plead for the widow.
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.