Aesop's Fables. Translated by Rev. George Fyler Townsend. 1860.

A traveller about to set out on a journey saw his Dog stand at the door stretching himself. He asked him sharply, "Why do you stand there gaping? Everything is ready but you, so come with me instantly."

The Dog, wagging his tail, replied, "O, master! I am quite ready; it is you for whom I am waiting."

The loiterer often blames delay on his more active friend.