He invites future injuries who rewards past ones.
More Dutch Proverbs:
One cannot shoe a running horse.Dutch
The old ones sing, the young ones pipe.
Dutch
That beer's of your own brewing, and you must drink it.
Dutch
Love others well, but love thyself the most; give good for good, but not to thine own cost.
Dutch
The frog will jump back into the pool, although it sits on a golden stool.
Dutch
Herring in the land, the doctor at a stand.
Dutch