Isaiah 1:16-18

16 Wash yourselves, make yourselves clean; put away the evil of your doings from before my eyes; cease to do evil;

17 learn to do good; seek judgment; restore unto the oppressed; hear the fatherless in right [judgment]; protect the widow.

18 Then come, shall the LORD say, and we shall be even; if your sins were as scarlet, they shall be made as white as snow; if they were red like crimson, they shall become as wool.