A full belly is neither good for flight, nor for fighting.
More Spanish Proverbs:
If the sky falls we shall catch larks.Spanish
A bespattered hog tries to bespatter another.
Spanish
Better they should say, "There he ran away," than "There he died."
Spanish
Eating sets the head to rights.
Spanish
Learn from your tears and you will win laughing.
Spanish
He is my friend who grinds at my mill.
Spanish