Isaiah 1:16-18

16Wash you, make you clean; put away the evil of your doings from before mine eyes; — cease to do evil,

17learn to do well: seek judgment, gladden the oppressed, do justice to the fatherless, plead for the widow.

18Come now, let us reason together, saith Jehovah: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.