"All the perfumes of Arabia will not sweeten this little hand" is from which play?

The line: "All the perfumes of Arabia will not sweeten this little hand" is from the William Shakespeare play "Macbeth" (1606). These words are spoken by Lady Macbeth in Act V, scene I. Lady Macbeth is making it very clear that she means that nothing will ever get rid of the blood she has gotten on her hands that night. What's done cannot be undone. There's no changing the past for her.

Lady Macbeth's guilt over her involvement in both Duncan's and Banquo's murders, even though she only helped plan the former and not the latter, will develop and grow over time. She will find that her prior actions result in a deep obsession and depression, which in the end gets the better of her. She will not be able to absolve herself of murder! She dies in "Macbeth" in the last act of an apparent suicide.