A rich man had two sons. The older one was wise, while the younger son was foolish.
Eventually, the man died. He left his money and property to his sons in his will.
At the signing of the will, it turned out that the pen had no ink left.
The wise brother had brought his own pen for situations like these, and signed the will.
Unfortunately, the foolish son could not use the wise son's pen, because it was low on ink. He tried to find another pen, but it was too late. The older son inherited all of his father's money and property.
The lesson of this parable is to always be prepared, even for things that may not happen.