Whosoever draws his sword against the prince must throw the scabbard away.
More French Proverbs:
Might knows no right.French
Beauty is silent eloquence.
French
If you lend something you may lose it, but not if you give it.
French
Many a one suffers for what he can't help.
French
Misfortunes that can't be avoided must be sweetened.
French
You cannot make a hawk of a buzzard.
French