Aesop's Fables: The frog who claimed to be a doctor and the Fox

Aesop's Fables and classic Fables

He shouted one day a frog from his swamp other animals:
-I am a doctor and know very well all the remedies for all ills!
A slut heard her and called him:
-How dare you announce to help others, when you limp and not know you heal?

Never ye shall proclaim what can not demonstrate by example.

Translated for educational purposes