Careful Words

injury (n.)

  A fly bit the bare pate of a bald man, who in endeavouring to crush it gave himself a hard slap. Then said the fly jeeringly, "You wanted to revenge the sting of a tiny insect with death; what will you do to yourself, who have added insult to injury?"

Phaedrus (8 a d): Book v. Fable 3, 1.