Vernon Jones (1912)
162. THE BALD MAN AND THE FLY
A Fly settled on the head of a Bald Man and bit him. In his eagerness to kill it, he hit himself a smart slap. But the Fly escaped, and said to him in derision, "You tried to kill me for just one little bite; what will you do to yourself now, for the heavy smack you have just given yourself?" "Oh, for that blow I bear no grudge," he replied, "for I never intended myself any harm; but as for you, you contemptible insect, who live by sucking human blood, I'd have borne a good deal more than that for the satisfaction of dashing the life out of you!"
Aesop's Fables: A New Translation by V.S. Vernon Jones with illustrations by Arthur Rackham (1912). This book is available online at Project Gutenberg.