Aesop's Fables

The Charcoal-Burner and the Fuller

A CHARCOAL-BURNER carried on his trade in his own house.  One day
he met a friend, a Fuller, and entreated him to come and live
with him, saying that they should be far better neighbors and
that their housekeeping expenses would be lessened.  The Fuller
replied, “The arrangement is impossible as far as I am concerned,
for whatever I should whiten, you would immediately blacken again
with your charcoal.”

Like will draw like.