Note to Romeo and Juliet, 3.1.93: "Ay, ay, a scratch, a scratch; marry, 'tis enough."

Romeo and Juliet,
Act 3, Scene 1, line 93.
Mercutio says his wound is nothing much, only a "scratch" from a kitty (Tybalt, King of Cats), but it is indeed enough to kill him.

Michael York as Tybalt | 1968 film