The Ant and the Dove

 

Aesop's Fables: AN ANT went to the bank of a river to quench its thirst, and
being carried away by the rush of the stream, was on the point of
drowning.  A Dove sitting on a tree overhanging the water plucked
a leaf and let it fall into the stream close to her.  The Ant
climbed onto it and floated in safety to the bank.  Shortly
afterward a birdcatcher came and stood under the tree, and laid
his lime-twigs for the Dove, which sat in the branches.  The Ant,
perceiving his design, stung him in the foot.  In pain, the
birdcatcher threw down the twigs, and the noise made the Dove
take wing.

One good turn deserves another