Wake not a sleeping cat.
More French Proverbs:
What a monk thinks he dares to do.French
You often meet your destiny on the road you take to avoid it.
French
The old monkey gets the apple.
French
Silence is the soul of all things.
French
An ounce of favour goes further, or is worth more, than a pound of justice.
French
One for the mouse, one for the crow, one to rot, one to grow.
French