The Traveler And His Dog

A Traveler, preparing to set out on a journey, saw his Dog standing at the door stretching himself. He asked the Dog sharply, "Why do you stand there gaping? Everything is ready but you!" The Dog, wagging his tail, replied, "Oh, I am quite ready, master; in fact, I have been waiting for you." The loiterer often attributes the delays he causes to his more active friends.

The Fables of Aesop (1995) at 57-58.