A full sack pricks up its ear.
More Italian Proverbs:
The ass's hide is used to the stick.Italian
The moon does not heed the baying of dogs.
Italian
Friendship should be unpicked, not rent.
Italian
To him who can take what thou hast, give what he asks.
Italian
No one should take in an eating pawn (or pledge).
Italian
A great man will not trample on a worm, nor sneak to an emperor.
Italian